Google Books Ngram Viewer

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

1800 - 1867 1868 - 1943 1944 - 1955 1956 - 1996 1997 - 2008 realize English
1800 - 1880 1881 - 1915 1916 - 1922 1923 - 1984 1985 - 2008 realise English

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