Google Books Ngram Viewer

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

1500 - 1732 1733 - 1839 1840 - 1857 1858 - 1954 1955 - 2008 portentous English

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