Set recurrent time periods when the voucher is valid. For example, valid for 1 hour every other day.start_date required when including the validity_timeframe.
| Name | Type | Description | Notes |
|---|---|---|---|
| duration | String | Defines the amount of time the voucher will be active in ISO 8601 format. For example, a voucher with a `duration` of `PT1H` will be valid for a duration of one hour. | [optional] |
| interval | String | Defines the intervening time between two time points in ISO 8601 format, expressed as a duration. For example, a voucher with an `interval` of `P2D` will be active every other day. | [optional] |