The BYU Corpus of American English is the first large corpus of American English, and it is freely available online. It contains more than 360 million words of text, including 20 million words each year from 1990-2007, and it is equally divided among spoken, fiction, popular magazines, newspapers, and academic texts (more information). The corpus will also be updated at least twice each year from this point on, and will therefore serve as a unique record of linguistic changes in American English.