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Includes more than 400 million words of text of American English, covering two centuries. Allows researchers to measure how words, phrases, and grammatical constructions have increased or decreased in frequency; and how words have changed meanings.
Includes a range of corpora of spoken and written Chinese, specifically designed for grammatical and lexical studies of Mandarin, as well as contrastive and translation studies of Chinese and English. The English language interface might make this easier for some scholars.