Google Books Ngram Viewer

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

1965 - 1978 1979 - 1994 1995 - 1996 1997 - 2003 2004 - 2008 hans kung English
1965 - 1971 1972 - 1998 1999 - 2001 2002 - 2005 2006 - 2008 karl rahner English
1965 - 1986 1987 - 2004 2005 2006 2007 - 2008 joseph ratzinger English
1965 - 2004 2005 2006 2007 2008 benedict xvi English
1965 - 1979 1980 - 1999 2000 - 2001 2002 - 2004 2005 - 2008 avery dulles English

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