Survey of English Usage
The UCL Survey of English Usage is a project at University College London founded in 1959 by Randolph Quirk. Many well-known linguists have spent time doing research at the Survey, including David Crystal and Sidney Greenbaum.
The million-word survey corpus is a corpus which samples written and spoken British English produced between c.1955 and 1985. It comprises 200 texts, each of 5,000 words. The spoken texts include both dialogue and monologue, while the written texts include not only printed and manuscript material but also examples of English read aloud, as in broadcast news and scripted speeches.