"Lord knows" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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          "word": "God knows"
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      "examples": [
        {
          "ref": "1974, Ronnie Van Zant et al., “Freebird”, in (Pronounced 'Lĕh-'nérd 'Skin-'nérd)",
          "text": "Lord knows, I can't change.",
          "type": "quotation"
        },
        {
          "ref": "1991 August 10, Richard C. Engler, “Keep Writing Those Letters”, in Gay Community News, volume 19, number 4, page 3",
          "text": "My lover is dead, my property and his are gone lord knows where?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of God knows"
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  "word": "Lord knows"
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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      "alt_of": [
        {
          "word": "God knows"
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      "examples": [
        {
          "ref": "1974, Ronnie Van Zant et al., “Freebird”, in (Pronounced 'Lĕh-'nérd 'Skin-'nérd)",
          "text": "Lord knows, I can't change.",
          "type": "quotation"
        },
        {
          "ref": "1991 August 10, Richard C. Engler, “Keep Writing Those Letters”, in Gay Community News, volume 19, number 4, page 3",
          "text": "My lover is dead, my property and his are gone lord knows where?",
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        "Alternative form of God knows"
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  "word": "Lord knows"
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