Google Books Ngram Viewer

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

1808 - 1960 1961 - 1999 2000 - 2002 2003 - 2005 2006 - 2008 billion English
1808 - 1890 1891 - 1968 1969 - 1975 1976 - 1985 1986 - 2008 thousand million English
1808 - 1913 1914 - 1936 1937 - 1941 1942 - 1975 1976 - 2008 milliard English

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