Google Books Ngram Viewer

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

1800 - 1915 1916 - 1941 1942 - 1949 1950 - 1993 1994 - 2008 industrial revolution English
1800 - 1955 1956 - 1973 1974 - 1978 1979 - 2004 2005 - 2008 neolithic revolution English

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