Google Books Ngram Viewer

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

1990 - 1996 1997 - 1998 1999 2000 2001 - 2004 gliese 229 English
1990 - 1999 2000 - 2005 2006 2007 2008 hd 209458 English
1990 - 1996 1997 - 1999 2000 2001 - 2004 2005 - 2007 51 pegasi English

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