Recursive count and sort by file extension in directory

count.sh

find ./ -type f | grep -E ".*\.[a-zA-Z0-9]*$" | sed -e 's/.*\(\.[a-zA-Z0-9]*\)$/\1/' | sort | uniq -c | sort -n

result.txt

      1 .1
      1 .ai
      1 .arcconfig
      1 .atom
      1 .bar
      1 .config
      1 .crt
      1 .csproj
      1 .db
      1 .engine
      1 .eps
      1 .foo
      1 .hbs
      1 .htc
      1 .htm
      1 .iml
      1 .key
      1 .LGPL
      1 .LICENSE
      1 .mk
      1 .mp4
      1 .mwb
      1 .name
      1 .odt
      1 .pdf
      1 .pem
      1 .phar
      1 .PNG
      1 .pptx
      1 .rss1
      1 .ser
      1 .skel
      1 .sln
      1 .srt
      1 .swp
      1 .tac
      1 .tinc
      1 .travisci
      1 .tsv
      1 .user
      1 .xap
      1 .xmind
      2 .0
      2 .cmd
      2 .coffee
      2 .conf
      2 .cur
      2 .eslintrc
      2 .fla
      2 .gitmodules
      2 .ics
      2 .jar
      2 .po
      2 .reg
      2 .script
      2 .theme
      2 .xaml
      2 .xcf
      2 .xls
      2 .yaml
      2 .zip
      3 .bowerrc
      3 .cs
      3 .dia
      3 .otf
      3 .swf
      4 .jsm
      4 .properties
      4 .rb
      5 .editorconfig
      5 .jpeg
      5 .profile
      5 .rss2
      5 .sql
      6 .as
      6 .gitattributes
      6 .gz
      6 .htaccess
      6 .ico
      6 .ini
      7 .markdown
      8 .lock
      8 .log
      8 .make
      9 .py
     10 .dist
     13 .patch
     13 .phpt
     13 .rst
     14 .afm
     16 .bmp
     16 .x
     18 .eot
     18 .woff
     19 .jshintrc
     19 .less
     21 .ufm
     24 .sh
     25 .svg
     37 .npmignore
     40 .ttf
     53 .gitignore
     53 .map
     58 .csv
     58 .xml
     73 .idx
     73 .pack
    150 .gif
    191 .jpg
    200 .md
    243 .scss
    289 .install
    344 .json
    351 .yml
    370 .txt
    390 .scssc
    425 .test
    461 .JPG
    550 .module
    560 .info
    657 .sample
    665 .css
    912 .png
   1347 .html
   1852 .php
   2770 .inc
   2954 .js