Google Books Ngram Viewer

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

1700 - 1719 1720 - 1742 1743 - 1763 1764 - 1959 1960 - 2005 smooths English
1700 - 1773 1774 - 1954 1955 - 1978 1979 - 1997 1998 - 2005 smoothes English
1700 - 1771 1772 - 1844 1845 - 1857 1858 - 1951 1952 - 2005 smoothe English

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