To schedule deletion of Cache, you need to set a Cache Lifespan. Cache Lifespan is a way to delete cache based on the URI of the webpage on the specified Interval of time.
1. To set a Cache Lifespan Rule, in WordPress Admin go to > SpeedyCache > Manage Cache Tab.
2. In Manage Cache Tab go to Cache Lifespan Section there click on Add New Rule button.
3. A popup will appear there, in that popup define REQUEST URI which you want to delete. REQUEST URI have 4 options.
4. After setting REQUEST URI you can now set the time interval after which you want your cache to get deleted.
That's it you have set a Cache Lifespan rule. Now the cache of the specified page will be deleted on the give interval.
See the below GIF for better understanding.