Interestingly, google's book indexing project shows that the word 'fuck' used to...

Interestingly, google's book indexing project shows that the word 'fuck' used to be a much more popular word back in the day than it is now - http://books.google.com/ngrams/graph?content=fuck&year_s...

I read some place it's because google's character recognition automation interprets the long S as an 'f' instead of an 's'