These are the most widely used online corpora,
and they have been
used by researchers from throughout the world as
the basis for
thousands of articles dealing with English. The corpus data (e.g.
word frequency) has also been used by a wide range of
large companies dealing with both technology
and also language resources,
including tech companies like Amazon,
Google, Microsoft, IBM, Sony, Disney, Intel, Adobe, Samsung, and a very large
US-based social media company; and language-related companies like Merriam-Webster, Dictionary.com, Grammarly,
Duolingo, TurnItIn, Oxford University Press, Sketch Engine; and many more.
The links below are for the
free online interface. You can also
purchase and download
corpora for use on your own computer.