It's fascinating to see how lexical vulgarity dropped during the Victorian period (1837 - 1901), but returned back with a vengeance, in less than one hundred years. The graph was generated using Google Books Ngram service, where you can plot occurrences of words found in their immense library of books.
source: https://books.google.com/ngrams/graph?content=fuck%2Cshit%2Ccunt&year_start=1550&year_end=2008&corpus=15&smoothing=4&share=&direct_url=t1%3B%2Cfuck%3B%2Cc0%3B.t1%3B%2Cshit%3B%2Cc0%3B.t1%3B%2Ccunt%3B%2Cc0
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Here's an example of pre-Victorian literature. It's from a book called "The School of Venus, or the ladies delight: Reduced into rules of Practice", by Michel Millot, and published in 1680.
source: http://books.google.ie/books?id=_9dNAAAAcAAJ&dq=inauthor%3A%22Michel%20Millot%22%20cunt&pg=PA16#v=onepage&q=inauthor:%22Michel%20Millot%22%20cunt&f=false
