Google Books Ngram Viewer

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

1800 - 1842 1843 - 1916 1917 - 1927 1928 - 1989 1990 - 2008 coal mine English
1800 - 1836 1837 - 1947 1948 - 1961 1962 - 1991 1992 - 2008 coalmine English

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