How many times does each value appear in a column?

Question

I have a column with time data like this:

17:27:31
17:27:32
17:27:32
17:27:33
17:27:33
17:27:34
17:27:34
17:27:34
17:27:35
17:27:36

I want

Answer 1

You can use CountIf. Put the following code in B1 and drag down the whole column

=COUNTIF(A:A,A1)

It will look like this: