It would be nice to be able to configure more advanced scheduling from the UI, right now you can be quite accurate but the you are force to do a daily backup at least.
Maybe something base on cron syntax would be nice, or simply adding more options to the drop down, like 24h, 48h, 72h, 120h, 1w this should be quick/easy and enough for most use cases.
I know there are other ways to do it but for docker this is quite useful.