Google Books Ngram Viewer

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

1800 - 1816 1817 - 1850 1851 - 1865 1866 - 1970 1971 - 2008 horse English
1800 - 1825 1826 - 1955 1956 - 1970 1971 - 1988 1989 - 2008 freedom English
1800 - 1851 1852 - 1937 1938 - 1948 1949 - 1992 1993 - 2008 machine English

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