Google Books Ngram Viewer

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

1800 - 1809 1810 - 1830 1831 - 1840 1841 - 1939 1940 - 2000 melancholy English
1800 - 1930 1931 - 1982 1983 - 1986 1987 - 1995 1996 - 2000 depression English
1800 - 1832 1833 - 1882 1883 - 1897 1898 - 1983 1984 - 2000 sadness English

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