Google Books Ngram Viewer

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

1800 - 1817 1818 - 1868 1869 - 1884 1885 - 1966 1967 - 2000 forty English
1800 - 1822 1823 - 1897 1898 - 1906 1907 - 1973 1974 - 2000 fourty English

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