Plan
Needs Starter at $5 a month or above.
Everyday jobs
Counts how much was said in the last few minutes and puts a slowmode on once a channel is moving faster than you want. When it settles the old slowmode comes back, exactly as you had it, so a busy hour never leaves a permanent setting behind. Anything quiet hours has locked is left alone, and a slowmode you set by hand is never lowered.
Needs Starter at $5 a month or above.
Every 15 minutes. Mamori checks on a timer, so a change can take one run to show up.
Its own clock. Nothing to grant beyond the module being on.
4 settings, all on the module page in the dashboard. The defaults are what you get before you touch anything.
Open the dashboard, pick the server, and find Automatic slowmode under Everyday jobs. Switch it on, set what you want, and it starts from the next run. Switching it off keeps the settings for next time.