"quinze jours" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fifteen days"
      },
      "expansion": "“fifteen days”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "fifteen days"
      },
      "expansion": "Literally, “fifteen days”",
      "name": "lit"
    },
    {
      "args": {
        "1": "cy",
        "2": "pythefnos",
        "lit": "fifteen nights"
      },
      "expansion": "Welsh pythefnos (literally “fifteen nights”)",
      "name": "noncog"
    },
    {
      "args": {
        "1": "ga",
        "2": "coicís",
        "lit": "fifteen"
      },
      "expansion": "Irish coicís (literally “fifteen”)",
      "name": "noncog"
    }
  ],
  "etymology_text": "Literally, “fifteen days”. Possibly originally a Celtic concept; compare the etymologies of Welsh pythefnos (literally “fifteen nights”) and Irish coicís (literally “fifteen”).",
  "head_templates": [
    {
      "args": {
        "1": "m-p"
      },
      "expansion": "quinze jours m pl (plural only)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Fifteen",
          "orig": "fr:Fifteen",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "in two weeks",
          "text": "dans quinze jours",
          "type": "example"
        },
        {
          "english": "once a fortnight; fortnightly",
          "text": "tous les quinze jours",
          "type": "example"
        },
        {
          "english": "It's been two weeks since I last saw him.",
          "text": "Ça fait quinze jours que je ne l’ai pas vu.",
          "type": "example"
        }
      ],
      "glosses": [
        "a fortnight, a period of two weeks, of fourteen days (exactly or approximately)"
      ],
      "id": "en-quinze_jours-fr-noun-Xb--9u3T",
      "links": [
        [
          "fortnight",
          "fortnight"
        ],
        [
          "two",
          "two"
        ],
        [
          "week",
          "week"
        ]
      ],
      "tags": [
        "masculine",
        "plural",
        "plural-only"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kɛ̃z ʒuʁ/"
    },
    {
      "ipa": "/kɛ̃ʒ‿.ʒuʁ/"
    }
  ],
  "word": "quinze jours"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fifteen days"
      },
      "expansion": "“fifteen days”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "fifteen days"
      },
      "expansion": "Literally, “fifteen days”",
      "name": "lit"
    },
    {
      "args": {
        "1": "cy",
        "2": "pythefnos",
        "lit": "fifteen nights"
      },
      "expansion": "Welsh pythefnos (literally “fifteen nights”)",
      "name": "noncog"
    },
    {
      "args": {
        "1": "ga",
        "2": "coicís",
        "lit": "fifteen"
      },
      "expansion": "Irish coicís (literally “fifteen”)",
      "name": "noncog"
    }
  ],
  "etymology_text": "Literally, “fifteen days”. Possibly originally a Celtic concept; compare the etymologies of Welsh pythefnos (literally “fifteen nights”) and Irish coicís (literally “fifteen”).",
  "head_templates": [
    {
      "args": {
        "1": "m-p"
      },
      "expansion": "quinze jours m pl (plural only)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French multiword terms",
        "French nouns",
        "French pluralia tantum",
        "French terms with IPA pronunciation",
        "French terms with usage examples",
        "fr:Fifteen"
      ],
      "examples": [
        {
          "english": "in two weeks",
          "text": "dans quinze jours",
          "type": "example"
        },
        {
          "english": "once a fortnight; fortnightly",
          "text": "tous les quinze jours",
          "type": "example"
        },
        {
          "english": "It's been two weeks since I last saw him.",
          "text": "Ça fait quinze jours que je ne l’ai pas vu.",
          "type": "example"
        }
      ],
      "glosses": [
        "a fortnight, a period of two weeks, of fourteen days (exactly or approximately)"
      ],
      "links": [
        [
          "fortnight",
          "fortnight"
        ],
        [
          "two",
          "two"
        ],
        [
          "week",
          "week"
        ]
      ],
      "tags": [
        "masculine",
        "plural",
        "plural-only"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/kɛ̃z ʒuʁ/"
    },
    {
      "ipa": "/kɛ̃ʒ‿.ʒuʁ/"
    }
  ],
  "word": "quinze jours"
}