I've got a trap out that I started July 16th. Things are progressing well and I'm seeing no bees leaving the cone any more (there for 15 minutes). They've completely filled a 5 frame deep nuc and I'll either steal some of those bees for another hive or put them in a 10 frame deep. I'm planning to remove the cone on Aug 17th to allow the new hive to rob out the old hive. How long does it normally take for an old hive to get robbed out?