Google Books Ngram Viewer

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

1700 - 1819 1820 - 1880 1881 - 1897 1898 - 1989 1990 - 2000 characterise English
1700 - 1791 1792 - 1971 1972 - 1984 1985 - 1993 1994 - 2000 characterize English

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