Google Books Ngram Viewer

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

1900 - 1902 1903 - 1906 1907 - 1942 1943 - 2000 2001 - 2000 when have you seen English
1900 - 1904 1905 - 1920 1921 - 1926 1927 - 1986 1987 - 2000 when did you see English

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