Google Books Ngram Viewer

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

1800 - 1907 1908 - 1971 1972 - 1980 1981 - 1990 1991 - 2000 percentage English
1800 - 1963 1964 - 1989 1990 - 1992 1993 - 1995 1996 - 2000 percentage point English

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