Google Books Ngram Viewer

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

1800 - 1855 1856 - 1941 1942 - 1952 1953 - 1990 1991 - 2000 crazy English
1800 - 1840 1841 - 1919 1920 - 1929 1930 - 1973 1974 - 2000 sane English

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