Corpus of Contemporary American English (COCA)

410 million words (80% written; 20% spoken)

• http://www.americancorpus.org
• http://view.byu.edu/

British National Corpus (BNC)

100 million words (90% written; 10% spoken)

1980s-1993

• http://www.natcorp.ox.ac.uk
• http://corpus.byu.edu/bnc/
• http://view.byu.edu/

Michigan Corpus of Spoken Academic English (MICASE)

• Michigan Corpus of Spoken Academic English

British Academic Spoken English Corpus (BASE)

British Academic Written English Corpus (BAWE)

• http://ca.sketchengine.co.uk/open/

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• Google Books
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