Google Books Ngram Viewer

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

1975 - 1991 1992 - 1999 2000 2001 - 2004 2005 - 2008 postmodern English
1975 - 1978 1979 - 2001 2002 - 2004 2005 - 2006 2007 - 2008 pirates English

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