collections.Counter() was the slowest option according to the benchmark from 2010 http://stackoverflow.com/questions/2522152/python-is-a-dictionary-slow-to-find

collections.Counter() was the slowest option according to the benchmark from 2010 http://stackoverflow.com/questions/2522152/python-is-a-dictionary-slow-to-find-frequency-of-each-character http://stackoverflow.com/questions/2522152/python-is-a-dicti...