Google Books Ngram Viewer

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

1800 - 1814 1815 - 1829 1830 - 1887 1888 - 1977 1978 - 2008 anderthalb German
1800 - 1931 1932 - 1987 1988 - 1994 1995 - 2001 2002 - 2008 eineinhalb German

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