It shows each of the 4-digit numbers just once in a 12 hour cycle.
If you were asking how many times each digit, 0-9, appears in a 12 hour cycle:
0 - 252 times
1 - 492 times
2 - 312 times
3 - 252 times
4 - 252 times
5 - 252 times
6 - 132 times
7 - 132 times
8 - 132 times
9 - 132 times
Assuming that times like 9:52 do not appear as 09:52.
34
1:11
120 times
Oh, what a happy little question! In a 24-hour day, the digit 7 will appear 8 times on a digital clock. You can find it in times like 07:07, 17:37, and 23:57. Just imagine those sevens dancing across the clock, bringing joy to each hour.
36 times
5 times
146
146
many times.
34
1:11
Nothing of any significance. It is either during the eleventh hour or elevem minites past the hour on a digital clock. On an analogue clock it is visible at all times.
A 24 hour clock displays digits whose sum total equals the number of led's used to display them 94 times a day. A 12 hour clock displays them 108 times a day.
The first digital alarm clock was invented in 1956 by D.E. Protzmann, an engineer at General Electric. This alarm clock featured a digital display and the ability to set specific alarm times, setting the foundation for modern digital alarm clocks.
120 times
The number 5 will appear 146 times in 24 hours.
There are 93 such events.