Google Books Ngram Viewer

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

1800 - 1910 1911 - 1973 1974 - 1980 1981 - 1996 1997 - 2008 century ad English
1800 - 1973 1974 - 2001 2002 - 2003 2004 - 2005 2006 - 2008 century ce English

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