Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1800 - 1816 1817 - 1831 1832 - 1880 1881 - 1960 1961 - 2000 cock English
1800 - 1818 1819 - 1853 1854 - 1867 1868 - 1970 1971 - 2000 balls English
1800 - 1817 1818 - 1834 1835 - 1900 1901 - 1985 1986 - 2000 breasts English
1800 - 1815 1816 - 1830 1831 - 1883 1884 - 1979 1980 - 2000 ass English

Run your own experiment! Raw data is available for download here.
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