Google Books Ngram Viewer

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

1930 - 1986 1987 - 1999 2000 - 2001 2002 - 2006 2007 - 2008 feminist credentials English
1930 - 1999 2000 - 2005 2006 2007 2008 heteronormative English
1930 - 1985 1986 - 1997 1998 - 1999 2000 - 2005 2006 - 2008 phallocentric English

Run your own experiment! Raw data is available for download here.
© 2013 Google - Privacy & Terms - About Google - About Google Books - About Ngram Viewer