Google Books Ngram Viewer

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

1900 - 1913 1914 - 1940 1941 - 1946 1947 - 1993 1994 - 2008 war English
1900 - 1914 1915 - 1942 1943 - 1950 1951 - 1995 1996 - 2008 oil English

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