On a side note to the posts I have read regarding those looking for a way to change frequency on a schedule. I cannot jam something out as fast as most of the people experienced with cron jobs as my background was mainly DOS, and then windows with some old skills with my TI products in the late 80s, but, I do know this can be done using a cron job which can be setup to execute. Avalon makes it even easier through the GUI where they allow you to execute a cron job. Doing it with the limited Bitmain GUI you need to do it through SSH in and editing a couple of files to have this more automated.
I recommend posting a small bounty in the mining software area as I'm sure someone can knock this out quickly enough. Who knows, if you get a quote there may be enough interested people to help go in with you and cover the cost.
It may be something Kano or CK would be able to work in their very busy sleepless schedules once coin became a variable.
Just something to think about, and it never hurts to ask.
No cron (at least on the s7). It's on busybox linux which it not unlike most router software. Minimal.
If it were me, I'd just write a bash/perl script to check the time, do what's needed (either via copy or sed), kick the miner and go to sleep for a bit. The miner itself runs via screen which is sort of a lazy man's daemon, you could use the same.
If cron were available, it would be an easy cp or sed/restart on schedule. Without it, it's a little more complicated. Not enough time in the day, lol.