Add the time options

We thought about the time options. We think the added complexity might not be worth the effort. Keeping revisions for an x number of days is really short. Defining an x number of weeks is a bit more granular, but not really that much. Of course, this is also just an opinion.

We have no problem adding this functionality, but it would be great to get some more insights on how often this is used. Overall, I think configuring the plugins using months already provides a lot of control and makes the module easier to maintain and configure.