Google Books Ngram Viewer

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

1800 - 1919 1920 - 1982 1983 - 1987 1988 - 1992 1993 - 2000 fluctuates wildly English
1800 - 1915 1916 - 1958 1959 - 1965 1966 - 1985 1986 - 2000 fluctuates widely English

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