"churn rate" meaning in English

{
  "forms": [
    {
      "form": "churn rates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "churn rate (plural churn rates)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 January 2, Paul Stephen, “A great place to work”, in Rail, pages 28–29:",
          "text": "These include higher performance levels, increased customer satisfaction and better business results, plus a range of other metrics such as staff churn rate, gender pay gap, industrial relations and staff satisfaction.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The annual percentage rate at which customers stop using a service, or employees leave a job (staff turnover)."
      ],
      "id": "en-churn_rate-en-noun-PB5Y-unL"
    }
  ],
  "word": "churn rate"
}

{
  "forms": [
    {
      "form": "churn rates",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "churn rate (plural churn rates)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2020 January 2, Paul Stephen, “A great place to work”, in Rail, pages 28–29:",
          "text": "These include higher performance levels, increased customer satisfaction and better business results, plus a range of other metrics such as staff churn rate, gender pay gap, industrial relations and staff satisfaction.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The annual percentage rate at which customers stop using a service, or employees leave a job (staff turnover)."
      ]
    }
  ],
  "word": "churn rate"
}