Google Books Ngram Viewer

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

1900 - 1930 1931 - 1945 1946 - 1951 1952 - 1992 1993 - 2000 sell the idea English

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