Google Books Ngram Viewer

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

1950 - 1974 1975 - 1999 2000 2001 - 2003 2004 - 2008 senkaku islands English
1950 - 1998 1999 2000 2001 - 2008 2009 - 2008 diaoyu islands English
1950 - 1966 1967 - 1992 1993 - 1994 1995 - 2003 2004 - 2006 liancourt rocks English

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