As for how fast a super fills, only God can know that. There are too many variables. Your bees, Whats blooming, weather, everything else. Keep an eye on it during the honey flow. Add a second super when 7 frames are full. You can extract and return a super the same day, but you don't want to crowd your bees. If you want, you can pull just 1 or 2 frames for yourself and leave the rest for the bees. The honey won't go bad for the bees.