"dog's age" meaning in All languages combined

{
  "etymology_text": "See dog year.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "dog's age"
      },
      "expansion": "dog's age",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "John Higgins, I haven't seen you in a dog's age.",
          "type": "example"
        }
      ],
      "glosses": [
        "A long time; many years."
      ],
      "id": "en-dog's_age-en-noun--69kkJ1Q",
      "raw_glosses": [
        "(US, colloquial) A long time; many years."
      ],
      "synonyms": [
        {
          "sense": "colloquial: a long time",
          "word": "coon's age"
        },
        {
          "word": "donkey's years"
        }
      ],
      "tags": [
        "US",
        "colloquial"
      ]
    }
  ],
  "word": "dog's age"
}

{
  "etymology_text": "See dog year.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "dog's age"
      },
      "expansion": "dog's age",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English colloquialisms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "John Higgins, I haven't seen you in a dog's age.",
          "type": "example"
        }
      ],
      "glosses": [
        "A long time; many years."
      ],
      "raw_glosses": [
        "(US, colloquial) A long time; many years."
      ],
      "tags": [
        "US",
        "colloquial"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "colloquial: a long time",
      "word": "coon's age"
    },
    {
      "word": "donkey's years"
    }
  ],
  "word": "dog's age"
}