The Index of Coincidence is a measure of the probability of two randomly selected letters being the same in a piece of text. It was first described by William Friedman and his wife Elizabeth in the 1920s.
The search "index of pirates 2005" often appears in queries for direct server directories of the 2005 film Pirates (a high-budget adult action-adventure parody). However, your query for "paper" suggests you are looking for academic research or industry reports related to the film's impact or movie piracy in 2005. index of pirates 2005
Google’s advanced operators can still find remnants: The Index of Coincidence is a measure of