I have two colums, of which column B has months and dates. Sometimes the
date can be up to three times added, or not at all. I can't figure out a
formula to show me how many times Mar was added (12 in the below case) and
Apr was added (6 in the below case).

Number of update Date
1 1-Mar
2 1-Mar
3 1-Mar
4 2-Mar
5 2-Mar
6 2-Mar
7 3-Mar
8 3-Mar
9 3-Mar
10 4-Mar
11 4-Mar
12 4-Mar
13 1-Apr
14 1-Apr
15 1-Apr
16 2-Apr
17 2-Apr
18 2-Apr

Please help and thanks in advance!