Google Books Ngram Viewer

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

1850 - 1918 1919 - 1927 1928 - 1935 1936 - 1995 1996 - 2008 obsessed by English
1850 - 1930 1931 - 1991 1992 - 1997 1998 - 2002 2003 - 2008 obsessed with English

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