Google Books Ngram Viewer

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

1900 - 1944 1945 - 1962 1963 - 1965 1966 - 1985 1986 - 2000 caucasoid English
1900 - 1923 1924 - 1960 1961 - 1965 1966 - 1984 1985 - 2000 mongoloid English
1900 - 1922 1923 - 1945 1946 - 1950 1951 - 1978 1979 - 2000 negroid English
1900 - 1912 1913 - 1966 1967 - 1973 1974 - 1993 1994 - 2000 caucasian English

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