Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
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1950 - 1988 1989 - 1993 1994 1995 - 2002 2003 - 2004 elliott wave principle English
1950 - 1982 1983 - 2002 2003 2004 - 2006 2007 - 2008 elliott wave theory English

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