"a stopped clock is right twice a day" meaning in English

{
  "head_templates": [
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      "args": {
        "1": "en",
        "2": "proverb",
        "head": ""
      },
      "expansion": "a stopped clock is right twice a day",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "a stopped clock is right twice a day",
      "name": "en-proverb"
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  "lang": "English",
  "lang_code": "en",
  "pos": "proverb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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      "glosses": [
        "A normally unreliable person or instrument can occasionally provide correct information, even if only by accident."
      ],
      "id": "en-a_stopped_clock_is_right_twice_a_day-en-proverb-LFxzQu34",
      "links": [
        [
          "unreliable",
          "unreliable"
        ]
      ],
      "synonyms": [
        {
          "word": "even a blind squirrel can find a nut once in a while"
        },
        {
          "word": "even a blind squirrel finds an acorn every now and then"
        },
        {
          "word": "even a blind squirrel finds an acorn every once in a while"
        },
        {
          "word": "a broken clock is right twice a day"
        },
        {
          "word": "even a stopped clock is right twice a day"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "rikkinäinen kellokin on kahdesti päivässä oikeassa"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "même une pendule cassée donne l’heure deux fois par jour"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "auch ein blindes Huhn findet mal ein Korn"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "trafiło się ślepej kurze ziarno"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "hasta un reloj parado acierta la hora dos veces al día"
        },
        {
          "code": "tr",
          "lang": "Turkish",
          "sense": "something or someone unreliable is right sometimes, even by accident",
          "word": "bozuk saat bile günde iki defa doğruyu gösterir"
        }
      ]
    }
  ],
  "word": "a stopped clock is right twice a day"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "proverb",
        "head": ""
      },
      "expansion": "a stopped clock is right twice a day",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "a stopped clock is right twice a day",
      "name": "en-proverb"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "proverb",
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        "English entries with incorrect language header",
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      "glosses": [
        "A normally unreliable person or instrument can occasionally provide correct information, even if only by accident."
      ],
      "links": [
        [
          "unreliable",
          "unreliable"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "even a blind squirrel can find a nut once in a while"
    },
    {
      "word": "even a blind squirrel finds an acorn every now and then"
    },
    {
      "word": "even a blind squirrel finds an acorn every once in a while"
    },
    {
      "word": "a broken clock is right twice a day"
    },
    {
      "word": "even a stopped clock is right twice a day"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "rikkinäinen kellokin on kahdesti päivässä oikeassa"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "même une pendule cassée donne l’heure deux fois par jour"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "auch ein blindes Huhn findet mal ein Korn"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "trafiło się ślepej kurze ziarno"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "hasta un reloj parado acierta la hora dos veces al día"
    },
    {
      "code": "tr",
      "lang": "Turkish",
      "sense": "something or someone unreliable is right sometimes, even by accident",
      "word": "bozuk saat bile günde iki defa doğruyu gösterir"
    }
  ],
  "word": "a stopped clock is right twice a day"
}