Dr. Lei Lei of Huazhong University of Science and Technology has recently published an article based on Crown and CLOB corpora, which examines the lexical change of American and British English between 1961 and 2009.

Lei Lei & Zehua Liu (2014).A Word Type-based Quantitative Study on the Lexical Change of American and British English.Journal of Quantitative Linguistics, 21(1): 36-49.