Facchinetti, R. & Rissanen, M. (eds). "Corpus-based Studies of Diachronic English at the 25th Conference of the International Computer Archive of Modern and Medieval English (ICAME)", Verona, may 2004. :289-300
Changes in the English word courtesy are used to illustrate the fact that earlier stages of development may stay on in the language and have an independent existence, parallel and contemporaneous with more recent developments.
