Google Books Ngram Viewer

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

1800 - 1850 1851 - 1975 1976 - 1984 1985 - 1992 1993 - 2000 three people English
1800 - 1812 1813 - 1822 1823 - 1857 1858 - 1950 1951 - 2000 three persons English

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