Google Books Ngram Viewer

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

1800 - 1894 1895 - 1981 1982 - 1988 1989 - 1994 1995 - 2000 caffeine English
1800 - 1895 1896 - 1983 1984 - 1988 1989 - 1994 1995 - 2000 migraine English

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