I want to print the every number's frequency(repetation) of inputed numbers

Question

If my input is 1,6,8,1,3,6,1,1
Then he will print
1 occurs 4 times
6 occurs 2 times
8 occurs 1 times
3 occurs 1 times

Answer 1

Try it yourself first then after your try I'll help you!
Hint use indexOf or ES6 better