"person-year" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "person",
        "3": "year"
      },
      "expansion": "person + year",
      "name": "compound"
    }
  ],
  "etymology_text": "From person + year, although, as with any such unit of measure, the mathematical relationship of multiplication is simultaneously involved: 1 person × 1 year = 1 person-year, just as 1 newton acting at a distance of 1 metre = 1 newton metre.",
  "forms": [
    {
      "form": "person-years",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "person-year (plural person-years)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant manual script codes",
          "parents": [
            "Terms with non-redundant manual script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Italian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Japanese translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Meronyms: person-hour, man-hour < person-day, man-day < person-month, man-month"
        },
        {
          "text": "Altogether it took hundreds of person-years to build the bridge and dam, and such a payroll is not cheap.",
          "type": "example"
        }
      ],
      "glosses": [
        "One person's working time for a year, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task."
      ],
      "id": "en-person-year-en-noun-XEuFFuPA",
      "links": [
        [
          "person",
          "person"
        ],
        [
          "work",
          "work"
        ],
        [
          "labor",
          "labor"
        ],
        [
          "task",
          "task"
        ]
      ],
      "synonyms": [
        {
          "word": "man-year"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "one person's working time",
          "word": "henkilötyövuosi"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "one person's working time",
          "word": "année-homme"
        },
        {
          "code": "it",
          "lang": "Italian",
          "sense": "one person's working time",
          "tags": [
            "masculine"
          ],
          "word": "anno-uomo"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "ninnen",
          "sense": "one person's working time",
          "word": "人年"
        }
      ]
    }
  ],
  "word": "person-year"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "person",
        "3": "year"
      },
      "expansion": "person + year",
      "name": "compound"
    }
  ],
  "etymology_text": "From person + year, although, as with any such unit of measure, the mathematical relationship of multiplication is simultaneously involved: 1 person × 1 year = 1 person-year, just as 1 newton acting at a distance of 1 metre = 1 newton metre.",
  "forms": [
    {
      "form": "person-years",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "person-year (plural person-years)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "Entries with translation boxes",
        "Japanese terms with non-redundant manual script codes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Italian translations",
        "Terms with Japanese translations",
        "en:Units of measure"
      ],
      "examples": [
        {
          "text": "Meronyms: person-hour, man-hour < person-day, man-day < person-month, man-month"
        },
        {
          "text": "Altogether it took hundreds of person-years to build the bridge and dam, and such a payroll is not cheap.",
          "type": "example"
        }
      ],
      "glosses": [
        "One person's working time for a year, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task."
      ],
      "links": [
        [
          "person",
          "person"
        ],
        [
          "work",
          "work"
        ],
        [
          "labor",
          "labor"
        ],
        [
          "task",
          "task"
        ]
      ],
      "synonyms": [
        {
          "word": "man-year"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "one person's working time",
      "word": "henkilötyövuosi"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "one person's working time",
      "word": "année-homme"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "one person's working time",
      "tags": [
        "masculine"
      ],
      "word": "anno-uomo"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "ninnen",
      "sense": "one person's working time",
      "word": "人年"
    }
  ],
  "word": "person-year"
}