Google Books Ngram Viewer

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

1850 - 1915 1916 - 1928 1929 - 1933 1934 - 1987 1988 - 2005 irving fisher English
1850 - 1945 1946 - 1989 1990 - 1994 1995 - 1999 2000 - 2005 john maynard keynes English

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