Google Books Ngram Viewer

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

1800 - 1918 1919 - 1941 1942 - 1945 1946 - 1974 1975 - 2000 the coolth of English

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