Google Books Ngram Viewer

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

1800 - 1929 1930 - 1997 1998 - 2000 2001 2002 - 2008 südtirol English
1800 - 1944 1945 - 1966 1967 - 1969 1970 - 1997 1998 - 2008 alto adige English
1800 - 1915 1916 - 1917 1918 - 1919 1920 - 1993 1994 - 2008 trentino English

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