I was simply fiddling with Ngram viewer when my apparently naughty mind made me type the (real) "F-word" onto the text field, (the time was also chosen randomly, (1750-to-1993)), the results baffled me. (more like upside down flattened bell-curve)
From the results it seems entire 19th century and early-to-mid 20th writers heavily eschewed the word fuck (maybe the writers of that period were polite?) Is it an interesting coincidence or is Google playing with us?
How can it be that such a heavily used colloquial word, suddenly vanished from writings, only to rearise in modern times?
NOTE: This is purely an inquisitive question, I have no intention to make judgement on writers of any era.