count repetitive same values

count repetitive same values

Hi,

how can I count repetitive same values ?

for example:
var arr = [2, 2, 2,5, 2, 2, 4, 5, 5, 5, 9,4,4];
 
I want to get:
2 > 3
5 > 1
2 > 2
4 > 1
5 > 3
9 > 1
4 > 2

I will appreciate if you provide any hint

regards