Google Books Ngram Viewer

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

1800 - 1811 1812 - 1821 1822 - 1830 1831 - 1934 1935 - 2000 profess English
1800 - 1849 1850 - 1977 1978 - 1985 1986 - 1993 1994 - 2000 professional English

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