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