Google Books Ngram Viewer

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

1910 - 1954 1955 - 1990 1991 - 1994 1995 - 2004 2005 - 2008 werner heisenberg German
1910 - 1949 1950 - 1994 1995 - 2000 2001 - 2004 2005 - 2008 albert einstein German

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