Technically no, not with supers on.
5 day intervals, but check your mite drop constantly. I've had one or two with phenomenal drops even after 6-7 vapes.
Most are fine, just odd rogue ones. I now add Apivar strips to any I'm not happy with.
I've heard of a few theories why some hives continue to drop huge mite loads, even after a considerable number of vapes. Yet to hear of a reason that makes much sense, apart from inefficient vaping in some cases. I now vape from the top of the hive, using an eke with a hole for the sublimox nozzle and clear perspex top. So I know (and can see) the vaping is efficient, but you still get the odd problem hive.