"nine days' wonder" meaning in English

{
  "forms": [
    {
      "form": "nine days' wonders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "nine days' wonder"
      },
      "expansion": "nine days' wonder (plural nine days' wonders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "nine day wonder"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1960 January, G. Freeman Allen, “‘Condor’—British Railways’ Fastest Freight Train”, in Trains Illustrated, London: Ian Allan Publishing, →ISSN, →OCLC, page 47",
          "text": "In his letter to this journal Mr. Lawrence remarked that some traders were waiting to see if \"Condor\" was merely a nine days' wonder before scheduling its use by their goods.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of nine day wonder"
      ],
      "id": "en-nine_days'_wonder-en-noun-DJqcZiUn",
      "links": [
        [
          "nine day wonder",
          "nine day wonder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ʌndə(ɹ)"
    }
  ],
  "word": "nine days' wonder"
}

{
  "forms": [
    {
      "form": "nine days' wonders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "nine days' wonder"
      },
      "expansion": "nine days' wonder (plural nine days' wonders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "nine day wonder"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Rhymes:English/ʌndə(ɹ)",
        "Rhymes:English/ʌndə(ɹ)/4 syllables"
      ],
      "examples": [
        {
          "ref": "1960 January, G. Freeman Allen, “‘Condor’—British Railways’ Fastest Freight Train”, in Trains Illustrated, London: Ian Allan Publishing, →ISSN, →OCLC, page 47",
          "text": "In his letter to this journal Mr. Lawrence remarked that some traders were waiting to see if \"Condor\" was merely a nine days' wonder before scheduling its use by their goods.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of nine day wonder"
      ],
      "links": [
        [
          "nine day wonder",
          "nine day wonder#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ʌndə(ɹ)"
    }
  ],
  "word": "nine days' wonder"
}