This is Perl module Text::CountString.
Text::CountString installation is straightforward. If your CPAN shell is set up, you should just be able to do
% cpan Text::CountStringDownload it, unpack it, then build it as per the usual:
% perl Makefile.PL
% make && make testThen install it:
% make installText::CountString documentation is available as in POD. So you can do:
% perldoc Text::CountStringText::CountString is hosted on github http://github.com/bayashi/Text-CountString
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
Dai Okabayashi <bayashi@cpan.org>