How to count same values are exists in my record

Question

I have difficulty counting how many times a particular number appears in my table.

Let's say my table contains the following records:

number
 2
 4
 6
 2
 2
 4
 2

The following is what I want: If 2 exists 4 times, it should be counted and displayed along with 2 exists 4 exists 2 times and 6 exists 1 time.