Restrict hours of notification summaries

Notification summaries every four hours is a great well being tool to help reduce constant phone attention.

However their frequency means that the one thing I'm still guaranteed to do is wake up to the presentation of a bunch of interesting notifications which isn't the best way for me to start my day.

I'd like to be able to restrict notification summary bundles to only be delivered between certain hours (say 9am-9pm) and then if the 4 hours falls outside that, it doesn't come until that window arrives.

Then I don't wake up only to spend ages reading through my overnight notifications because that's what's been served up, but do so more intentionally later on (when coffee has allowed me more self control!)