Graph incoming Calls outside office hours(time range graph)

[MARIGLENCULLHAJJ]

Dear sir madam .
I wish everything is well .
I run 3cx enterprise .
Incoming calls are routed directly from sipTrunk to a callFlowApp which based on time routes calls on digitalRecepsionist1(8.30am-5.30pm) , digitalRecepsionist2 (5.31pm-10.59pm) or if time is 11.00pm to 8.30am it drops the call directly.
How can I graph the dropped calls , so the calls which came at 11.00pm to 8.30 am .
All the best.