Google Books Ngram Viewer

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

1945 - 1979 1980 - 2002 2003 - 2004 2005 - 2006 2007 - 2008 numbnuts English
1945 - 1970 1971 - 2001 2002 - 2004 2005 - 2006 2007 - 2008 correlation is not causation English
1945 - 1973 1974 - 2000 2001 - 2003 2004 - 2006 2007 - 2008 correlation does not imply causation English

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