Overlay Call Data From a Range of Dates To Show Busiest Call Times of Day Merged

For staffing purposes, I am trying to quickly look over a range of dates to find out what the busiest call times are in a 24 hour period. Do I need more staff at 9am or 4pm? I realize i can see a range of dates in a linear fashion, but that does not alow me to stack the data to get this info at a glance. It also doesn't let view it in an hourly breakdown any more than 30 days total. This would be a HUGE time saver vs. analysing each individual day. Many thanks!