Google Books Ngram Viewer

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

1800 - 1814 1815 - 1849 1850 - 1865 1866 - 1970 1971 - 2000 humanity English
1800 - 1807 1808 - 1815 1816 - 1849 1850 - 1951 1952 - 2000 mankind English

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