Google Books Ngram Viewer

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

1500 - 1725 1726 - 1777 1778 - 1789 1790 - 1891 1892 - 2008 two millions English
1500 - 1829 1830 - 1938 1939 - 1949 1950 - 1991 1992 - 2008 two million English

Run your own experiment! Raw data is available for download here.
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