Google Books Ngram Viewer

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

1600 - 1780 1781 - 1833 1834 - 1844 1845 - 1926 1927 - 2000 extent which it English
1600 - 1825 1826 - 1953 1954 - 1967 1968 - 1982 1983 - 2000 extent to which it English

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