"a fair bit" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "a fair bit (not comparable)",
      "name": "en-adverb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English positive polarity items",
          "parents": [
            "Positive polarity items",
            "Terms by semantic function"
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          "source": "w"
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
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          "source": "w"
        }
      ],
      "glosses": [
        "a little bit, somewhat, kind of; a good amount"
      ],
      "id": "en-a_fair_bit-en-adv-sfatcKLJ",
      "links": [
        [
          "a little bit",
          "a little bit"
        ],
        [
          "somewhat",
          "somewhat"
        ],
        [
          "kind of",
          "kind of"
        ]
      ],
      "raw_glosses": [
        "(informal, UK) a little bit, somewhat, kind of; a good amount"
      ],
      "tags": [
        "UK",
        "informal",
        "not-comparable"
      ]
    }
  ],
  "word": "a fair bit"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "a fair bit (not comparable)",
      "name": "en-adverb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "British English",
        "English adverbs",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English positive polarity items",
        "English terms with non-redundant non-automated sortkeys",
        "English uncomparable adverbs"
      ],
      "glosses": [
        "a little bit, somewhat, kind of; a good amount"
      ],
      "links": [
        [
          "a little bit",
          "a little bit"
        ],
        [
          "somewhat",
          "somewhat"
        ],
        [
          "kind of",
          "kind of"
        ]
      ],
      "raw_glosses": [
        "(informal, UK) a little bit, somewhat, kind of; a good amount"
      ],
      "tags": [
        "UK",
        "informal",
        "not-comparable"
      ]
    }
  ],
  "word": "a fair bit"
}