Possible period of a Budget.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/enums/budget_period.proto)

| Enums ||
|---|---|
| ## `CUSTOM_PERIOD` | Custom budget, added back in V5. Custom budget can be used with total_amount to specify lifetime budget limit. See: <https://support.google.com/google-ads/answer/6385083> for more info. |
| ## `DAILY` | Daily budget. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |