Depends on the type of operations. Generally, if it is operating scheduled short-haul flights then there will be anything from 2 to 8 sectors during the day, starting about 0500 local and finishing about midnight. If it's on charter then it will be operating between 2 and 6 sectors, starting at 0500 local but carrying on all through the night. Daily maintenance requirements mean the aircraft will be on the ground for a couple of hours at some point during the course of the day or night.
Obviously winter and summer flying programs are quite different and most charter aircraft will only operate 2 longish sectors during the day and be sitting on the ground for about 8-10 hours overnight.