Conversation so far:
How was Chris Barber's music career during the 50's and 60s?
Chris Barber and Monty Sunshine (clarinet) formed a band in 1953, calling it Ken Colyer's Jazzmen.
Was Ken Colyer's Jazzmen pretty successful?
In 1959 the band's version of Sidney Bechet's Petite Fleur, spent twenty-four weeks in the UK Singles Charts, making it to No. 3 and selling over one million copies.

Question: How long did it stay on the charts?
Self-contained rewrite: How long did the Ken Colyer's Jazzmen's verrsion of Petite Fleur stay on the charts?