"subchart" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub-",
        "3": "chart"
      },
      "expansion": "sub- + chart",
      "name": "af"
    }
  ],
  "etymology_text": "From sub- + chart.",
  "forms": [
    {
      "form": "subcharts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subchart (plural subcharts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017 May 23, Gavin Haynes, “Why BTS are the K-pop kings of social media”, in The Guardian",
          "text": "In an age when the charts have become an algorithmic spaghetti of streaming plays, radio and downloads, the purest way of measuring who is up and who is down in pop might be the Billboard Social 50, a sub-chart that measures reach across social networks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A secondary chart."
      ],
      "id": "en-subchart-en-noun-VWZJWAVU",
      "links": [
        [
          "chart",
          "chart"
        ]
      ],
      "synonyms": [
        {
          "word": "sub-chart"
        }
      ]
    }
  ],
  "word": "subchart"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub-",
        "3": "chart"
      },
      "expansion": "sub- + chart",
      "name": "af"
    }
  ],
  "etymology_text": "From sub- + chart.",
  "forms": [
    {
      "form": "subcharts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "subchart (plural subcharts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with sub-",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2017 May 23, Gavin Haynes, “Why BTS are the K-pop kings of social media”, in The Guardian",
          "text": "In an age when the charts have become an algorithmic spaghetti of streaming plays, radio and downloads, the purest way of measuring who is up and who is down in pop might be the Billboard Social 50, a sub-chart that measures reach across social networks.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A secondary chart."
      ],
      "links": [
        [
          "chart",
          "chart"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "sub-chart"
    }
  ],
  "word": "subchart"
}