Google Books Ngram Viewer

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

1800 - 1911 1912 - 1984 1985 - 1989 1990 - 1994 1995 - 2000 research English
1800 - 1817 1818 - 1846 1847 - 1859 1860 - 1948 1949 - 2000 researches English

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