Cron Expression from Plain-English Schedule

{
  "type": "object",
  "required": [
    "description"
  ],
  "properties": {
    "description": {
      "type": "string",
      "description": "The schedule in plain English, naming how often and at what time the job should run."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "human_readable": {
      "type": "string",
      "description": "A plain-English reading of the expression."
    },
    "cron_expression": {
      "type": "string",
      "description": "A five-field cron expression: minute, hour, day of month, month, day of week."
    },
    "input_description": {
      "type": "string",
      "description": "The schedule text it was built from."
    }
  },
  "description": "The generated cron schedule."
}