Google Books Ngram Viewer

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

1800 - 1808 1809 - 1821 1822 - 1831 1832 - 1979 1980 - 2008 before christ English
1800 - 1968 1969 - 1996 1997 - 1998 1999 - 2004 2005 - 2008 before the common era English
1800 - 1978 1979 - 2003 2004 - 2005 2006 - 2007 2008 before common era English
1800 - 1878 1879 - 1935 1936 - 1941 1942 - 1992 1993 - 2008 before the christian era English

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