Google Books Ngram Viewer

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

1800 - 1810 1811 - 1828 1829 - 1837 1838 - 1929 1930 - 2000 profess English
1800 - 1853 1854 - 1973 1974 - 1982 1983 - 1991 1992 - 2000 professional English

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