Google Books Ngram Viewer

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

1800 - 1923 1924 - 1986 1987 - 1991 1992 - 1996 1997 - 2000 data English
1800 - 1816 1817 - 1833 1834 - 1891 1892 - 1977 1978 - 2000 knowledge English

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