curl --request POST \
  --url https://api.iotools.cloud/v1/tool/ngram-extractor \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputText": "The cat sat on the mat. The cat ran."
}
'

{
  "tool": "ngram-extractor",
  "tool_version": "1.0.1",
  "outputs": {
    "frequency": [
      {
        "rank": "1",
        "n-gram": "the cat",
        "count": "2",
        "percentage": "25.00%"
      },
      {
        "rank": "2",
        "n-gram": "cat ran",
        "count": "1",
        "percentage": "12.50%"
      },
      {
        "rank": "3",
        "n-gram": "cat sat",
        "count": "1",
        "percentage": "12.50%"
      },
      {
        "rank": "4",
        "n-gram": "mat the",
        "count": "1",
        "percentage": "12.50%"
      },
      {
        "rank": "5",
        "n-gram": "on the",
        "count": "1",
        "percentage": "12.50%"
      },
      {
        "rank": "6",
        "n-gram": "sat on",
        "count": "1",
        "percentage": "12.50%"
      },
      {
        "rank": "7",
        "n-gram": "the mat",
        "count": "1",
        "percentage": "12.50%"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}