It's something wrong with the Codewars environment in which the code is run (probably) as its sort mechanism behaves differently. At this point all you need is addingd an extra instruction to your sort function.

An interesting kata to solve BUT feels more like 6 kyu at least.

I keep getting valid results for random tests on repl.it for JS language but not here, the frequency stays only the order of digits with same frequency is random, like instead got: [27, 27, 0, 0, 47, 47, 44, 44, 7, 7, 11, 11, 39, 39, 37, 37, 26, 26, 17, 17, 24, 24, 21, 21, 48, 48, 19, 16, 1, 28, 29, 31, 32, 34, 18, 14, 13, 40, 41, 5, 45, 46, 4, 36] though right order stays for the very same input on repl.it, can I have a suggestion pls?

This was helpful, solved my issue, Thanks a lot!

How far does the testing go? I keep getting valid results but at the end I get the exit code 137 Max Buffer Size Reached (1.5 MB) as it seemingly tries to calculate and add up more and more insanely low fractions. Any Suggestions? Thanks in advance.