How many times the hands of a clock coincide in a day?

22

The hands of a clock coincide 11 times, every 12 hours, (12:00, 1:05, 2:11, 3:16, 4:22, 5:27, 6:32, 7:38, 8:44, 9:49, 10:55). The reason for the same is that the hands overlap about every 65 minutes, not every 60 minutes thus, making the coincidence rate to be 22 times in a day and not 24 times.