Google Books Ngram Viewer

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

1950 - 1955 1956 - 1965 1966 - 1970 1971 - 2002 2003 - 2008 world history English
1950 - 1998 1999 - 2006 2007 2008 2009 - 2008 transnational history English
1950 - 1958 1959 - 1995 1996 - 1999 2000 - 2003 2004 - 2008 international history English
1950 - 1973 1974 - 2002 2003 - 2004 2005 - 2006 2007 - 2008 global history English

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