Google Books Ngram Viewer

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

1900 - 1968 1969 - 2005 2006 2007 2008 führungskräfte German
1900 - 1915 1916 - 1952 1953 - 1958 1959 - 1988 1989 - 2008 betriebsleiter German
1900 - 1908 1909 - 1963 1964 - 1973 1974 - 1996 1997 - 2008 direktoren German
1900 - 1923 1924 - 1964 1965 - 1968 1969 - 1997 1998 - 2008 generaldirektoren German
1900 - 1916 1917 - 1992 1993 - 1998 1999 - 2004 2005 - 2008 geschäftsführer German
1900 - 1954 1955 - 1973 1974 - 1975 1976 - 2002 2003 - 2008 leitende angestellte German
1900 - 1961 1962 - 2004 2005 2006 2007 - 2008 manager German
1900 - 1987 1988 - 2005 2006 2007 2008 topmanager German

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