Google Books Ngram Viewer

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

1945 - 1951 1952 - 1971 1972 - 1976 1977 - 2002 2003 - 2008 enough so as to English
1945 - 1949 1950 - 1961 1962 - 1967 1968 - 2002 2003 - 2008 enough to English

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