Help me to find any similar problems like this array problem

help
,
1

The input is an array of numbers (not sorted),we have to output the array consisting of these numbers in decreasing order of number of times a particular number appeared in the array.
E.g :-
In :- 2,4,2,1,5,4,3,2.
out:- 2,2,2,4,4,5,3,1.

Please help me in finding similar problems like this.
Thank You

2

you can google the same thing and can find more example
here is one leetcode question : - LeetCode

3

Thank you