Find Long-Tail Phrases from One Seed

{
  "type": "object",
  "required": [
    "seedKeyword"
  ],
  "properties": {
    "seedKeyword": {
      "type": "string",
      "maxLength": 80,
      "minLength": 3,
      "description": "One English phrase to expand with additional words."
    }
  },
  "additionalProperties": false
}