Google Books Ngram Viewer

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

1700 - 1746 1747 - 1880 1881 - 1901 1902 - 1958 1959 - 2000 inexplicable English
1700 - 1879 1880 - 1940 1941 - 1951 1952 - 1988 1989 - 2000 unexplainable English

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