Google Books Ngram Viewer

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

1800 - 1831 1832 - 1833 1834 - 1894 1895 - 1997 1998 - 2000 people of color English
1800 - 1810 1811 - 1855 1856 - 1865 1866 - 1932 1933 - 2000 negroes English

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