Google Books Ngram Viewer

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

1800 - 1871 1872 - 1940 1941 - 1950 1951 - 1985 1986 - 2000 united states has English
1800 - 1833 1834 - 1929 1930 - 1943 1944 - 1979 1980 - 2000 united states have English

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