I work for a call center that does not make cold calls, but does call existing customers to remind them that they are due for a reorder. All contact info is put into a history_table including a Time/Date stamp. Is there any way to query this table to extract a time of day when successful contacts occur with respective customers on an historical basis, ie. after 3 or more successful contacts. We are trying to increase the success rate of contacting customers which will have many bottom line implications.