Google Books Ngram Viewer

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

1850 - 1920 1921 - 1989 1990 - 1995 1996 - 2001 2002 - 2008 see also English

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