The Corpus of Historical American English (COHA)

The Corpus of Historical American English (COHA) was created by Mark Davies, and it is the largest structured corpus of historical English. It is related to other corpora from English-Corpora.org, which are the most widely used corpora of English and which offer unparalleled insight into variation in English. COHA contains more than 475 million words of text from the 1820s-2010s (which makes it 50-100 times as large as other comparable historical corpora of English) and the corpus is balanced by genre decade by decade. The creation of the corpus results from a grant from the National Endowment for the Humanities (NEH) from 2008-2010.