Google Books Ngram Viewer

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

1700 - 1843 1844 - 1912 1913 - 1914 1915 - 2007 2008 coöperate English
1700 - 1843 1844 - 1973 1974 - 1984 1985 - 1995 1996 - 2008 cooperate English

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