Billing cycle frequency must be equal to or higher than 1

{
  "error": {
    "type": "request_error",
    "code": "price_billing_cycle_frequency_below_1",
    "detail": "billing_cycle.frequency must be equal to or higher than 1",
    "documentation_url": "https://developer.paddle.com/errors/prices/price_billing_cycle_frequency_below_1"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}