Google Books Ngram Viewer

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

1800 - 1909 1910 - 1960 1961 - 1968 1969 - 1989 1990 - 2000 twain English
1800 - 1820 1821 - 1919 1920 - 1938 1939 - 1978 1979 - 2000 two English

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