 The development of computational methods for collecting, analyzing, and searching corpora have seen rapid development as computer memory has become less expensive and search and analysis programs have become faster. The first computer searchable corpus of American English, the Brown Corpus, developed in the 1960s, contained just over one million word tokens. The British National Corpus (BNC) is a balanced corpus containing over 100 million words—a hundredfold size increase—of which 90% is written prose published from 1991 to 1994 and 10% is spoken English. Between 2005 and 2007, billion-word corpora were released for British English (ukWaC), German (deWaC), and Italian (itWaC)—a thousand times bigger than the Brown corpus. And the entire World Wide Web probably holds about a thousand times as much as that—around a trillion words. Thus corpus linguistics has gone from megabytes of data (∼ 103kB) to terabytes of data (∼ 109kB) in fifty years.