Google Books Ngram Viewer

Graph these case-sensitive comma-separated phrases:
between and from the corpus with smoothing of .

Search in Google Books:
1800 - 1849 1850 - 1975 1976 - 1986 1987 - 1996 1997 - 2008 penis (English)
1800 - 1851 1852 - 1878 1879 - 1888 1889 - 1987 1988 - 2008 vagina (English)
Run your own experiment! Raw data is available for download here.
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