"BYU Corpus of American English" (1990-2007) has 360 million word and is freely available online (http://www.americancorpus.org). New texts will be added at least two times each year from this point on (20 million new words each year; 4 million words in each of the five genres), and it will thus serve as a unique linguistic history of American English since 1990.

The corpus is composed of more than 360 million words in nearly 150,000 texts, including 20 million words each year from 1990-2007. For each year (and therefore overall, as well), the corpus is evenly divided between the five genres of spoken, fiction, popular magazines, newspapers, and academic journals. The texts come from a variety of sources.