Google Books Ngram Viewer

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

1800 - 1816 1817 - 1833 1834 - 1897 1898 - 1979 1980 - 2000 discernible English
1800 - 1806 1807 - 1970 1971 - 1980 1981 - 1989 1990 - 2000 discernable English

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