Google Books Ngram Viewer

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

1780 - 1833 1834 - 1935 1936 - 1948 1949 - 1986 1987 - 2008 united states are English
1780 - 1859 1860 - 1936 1937 - 1947 1948 - 1991 1992 - 2008 united states is English
1780 - 1829 1830 - 1930 1931 - 1945 1946 - 1985 1986 - 2008 united states have English
1780 - 1872 1873 - 1931 1932 - 1942 1943 - 1993 1994 - 2008 united states has English
1780 - 1836 1837 - 1938 1939 - 1950 1951 - 1985 1986 - 2008 united states were English
1780 - 1865 1866 - 1942 1943 - 1952 1953 - 1991 1992 - 2008 united states was English

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