Google Books Ngram Viewer

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

1700 - 1783 1784 - 1805 1806 - 1826 1827 - 1986 1987 - 2008 unicorn English
1700 - 1770 1771 - 1878 1879 - 1900 1901 - 1983 1984 - 2008 dragon English

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