Google Books Ngram Viewer

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

1500 - 1821 1822 - 1981 1982 - 1996 1997 - 2003 2004 - 2018 a mountain to climb English

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