Google Books Ngram Viewer

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

1900 - 1940 1941 - 1974 1975 - 1981 1982 - 2004 2005 - 2008 introvertiert German
1900 - 1954 1955 - 2003 2004 - 2005 2006 - 2007 2008 extrovertiert German
1900 - 1937 1938 - 1964 1965 - 1970 1971 - 1998 1999 - 2008 extravertiert German

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