Google Books Ngram Viewer

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

1975 - 1995 1996 - 2004 2005 2006 2007 - 2008 lean manufacturing English
1975 - 1992 1993 - 1999 2000 2001 - 2004 2005 - 2008 lean production English
1975 - 1995 1996 - 2004 2005 2006 2007 - 2008 operational excellence English
1975 - 2002 2003 - 2005 2006 2007 2008 lean six sigma English
1975 - 1983 1984 - 2003 2004 - 2005 2006 2007 - 2008 toyota production system English

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