Google Books Ngram Viewer

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

1950 - 1954 1955 - 1964 1965 - 1969 1970 - 2000 2001 - 2008 allein German
1950 - 1973 1974 - 2002 2003 - 2004 2005 - 2006 2007 - 2008 alleine German

Run your own experiment! Raw data is available for download here.
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