I have a column with data.
The data consists of incremental numbers:

Column A

1
2
3
4

1
2

1
2
3

What I want to do in column B is count the number of instances of each subset.
Result would look like this:

Column A Column B
4
1
2
3
4
2
1
2
3
1
2
3

The largest subset consists of 9 instances.

I tried reaching a solution using CountIf and nested If-statements, but
without any luck. Anybody have any bright ideas?

by the way 1:
I do have the add-on morefucntions, but didn't recognize a usefull fuction
in there either).

by the way 2: I could replace the numbers with a single character if that
would help simplify this issue.

Thanks in advance for your help.