"with a fine-toothed comb" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions adverbiales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "→ voir with, fine, tooth et comb « avec un peigne à dents fines »."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en anglais à traduire",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Métaphores en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "I've gone over the place with a fine-toothed comb, and I still can't find it."
        }
      ],
      "glosses": [
        "Au peigne fin."
      ],
      "id": "fr-with_a_fine-toothed_comb-en-adv-aHk6cnPX",
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "with a fine-toothed comb"
}

{
  "categories": [
    "Locutions adverbiales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "→ voir with, fine, tooth et comb « avec un peigne à dents fines »."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "senses": [
    {
      "categories": [
        "Exemples en anglais",
        "Exemples en anglais à traduire",
        "Métaphores en anglais"
      ],
      "examples": [
        {
          "text": "I've gone over the place with a fine-toothed comb, and I still can't find it."
        }
      ],
      "glosses": [
        "Au peigne fin."
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "with a fine-toothed comb"
}