Separate slots for auto-retweets in scheduler

For now, I can only set delay for my posts like "repost it after 23h".

But I have to always check at what time it would be published.

I would like to select repost hour from the list of predefined 'slots' in my calendar.

Workflow from user panel:

1) I enable "auto-retweet"

2) App is asking me to select type of retweet

↳ select exact hour (like 8:15 PM)

↳ publish on the next free slot from your calendar

↳ publish with delay (like 12h)

It would be great to have two types of slots in the calendar:

a) normal posts

b) perfect time for auto-repost