Google Books Ngram Viewer

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

1800 - 1943 1944 - 1992 1993 - 1997 1998 - 2002 2003 - 2008 spelling variants English
1800 - 1954 1955 - 1990 1991 - 1994 1995 - 2003 2004 - 2008 alternate spellings English
1800 - 1879 1880 - 1943 1944 - 1953 1954 - 1990 1991 - 2008 variations in spelling English

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