Google Books Ngram Viewer

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

1990 - 1991 1992 - 2003 2004 - 2005 2006 - 2007 2008 ruby English
1990 - 1991 1992 - 2000 2001 2002 - 2005 2006 - 2008 python English
1990 - 2002 2003 - 2005 2006 2007 2008 php English
1990 - 1998 1999 - 2004 2005 2006 - 2007 2008 java English

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