{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "rank": {
      "type": ["null", "number"]
    },
    "hour_of_week": {
      "type": ["null", "number"]
    },
    "hour_of_day": {
      "type": ["null", "number"]
    },
    "day_of_week": {
      "type": ["null", "number"]
    },
    "count": {
      "type": ["null", "count"]
    }
  }
}