Replace every n'th occurrence in huge line in a loop

Question

I have this line for example:

1,2,3,4,5,6,7,8,9,10

I want to insert a newline (\\n) every 2nd occurrence of \",\" (replace the 2nd, with ne

Answer 1

Can't add comment to wintermutes answer but it doesn't need the first , section as it will have to have had a previous field to be comma separated.

sed 's/\(,[^,]*\),/\1\n/g'

Will work the same

Also I'll add another alternative( albeit worse and leaves a trailing newline)

echo "1,2,3,4,5,6,7,8,9,10" | xargs -d"," -n2 | tr ' ' ','