Count/show file types in recursive tree

tree_file_types.sh

#!/bin/bash
# Reference: https://unix.stackexchange.com/a/387631

for d in */ ; do
        echo $d
        find $d -type f | sed -r 's/.*\/([^\/]+)/\1/' | sed 's/^[^\.]*$//' | sed -r 's/.*(\.[^\.]+)$/\1/' | sort | uniq -c | sort -nr
#       files only      | keep filename only          | no ext -> '' ext   | keep part after . (i.e. ext) | count          | sort by count desc
done