Google Books Ngram Viewer

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

1800 - 1848 1849 - 1919 1920 - 1931 1932 - 1996 1997 - 2008 duds English

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