Google Books Ngram Viewer

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

1900 - 1984 1985 - 1996 1997 1998 - 2004 2005 - 2008 turpan English
1900 - 1915 1916 - 1934 1935 - 1939 1940 - 1995 1996 - 2008 turfan English

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