Google Books Ngram Viewer

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

1800 - 1920 1921 - 1986 1987 - 1991 1992 - 2004 2005 - 2008 caddisfly English
1800 - 1909 1910 - 1947 1948 - 1953 1954 - 1997 1998 - 2008 caddis fly English

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