It is easy to create an event as below:

Start: Fri Apr 28 2023 13:00:00 GMT+0000
Finish: Wed May 31 2023 21:59:00 GMT+0000
Repeat: Every 3 minutes until Wed May 31 2023 21:59:00 GMT+0000

If you play it out, the resulting schedule would be something like:

Friday Apr 28 2023 13:00 - Weds May 31st 2023 21:59:00
Friday Apr 28 2023 13:03 - Weds May 31st 2023 22:02:00
Friday Apr 28 2023 13:06 - Weds May 31st 2023 22:05:00
...

Can we look at the difference in time between start and finish, and deny repeats that are less than that time period.

So for example, the difference between the start and finish here is 33 days, so we shouldn’t allow any repeat that more often than every 33 days?