Google Books Ngram Viewer

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

1750 - 1762 1763 - 1785 1786 - 1796 1797 - 1971 1972 - 2000 infect English
1750 - 1822 1823 - 1915 1916 - 1932 1933 - 1972 1973 - 2000 insect English

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