For a London play, rehearsal time would be four weeks for the entire show. In films, I'd spend six weeks on the big dance numbers to get them perfect before the actual shooting.

H. Allen PubliJessie Matthewsr 1974 (ISBN 0-491-01572-0)
Jessie Matthews - A Biography by Michael Thornton Hart-Davis PubliJessie Matthewsr 1974 (ISBN 0-246-10801-0)
Oxford Companion to Popular Music Peter Grimmond Oxford University Press 1991 (ISBN 0-19-280004-3). Matthews was acclaimed in the United Kingdom as a dancer and as the first performer of numerous popular songs of the 1920s and 1930s including "A Room with a View" and London Calling! by Noël Coward and "Let's Do It Let's Fall in Love" by Cole Porter.