That may have been 1971, when she did it in Toronto with some but not all of the same people. But that was several years after Vegas and London. She played it in Vegas from December 1966 through June 1967 (with the week in L.A. in early July), and then in London from October 1967 through April 1968.
She did do a lot of stock, a lot of tours that probably went on between six weeks and three months or so.
Even when she did I Do! I Do! in London with Rock Hudson in 1976, that was for a limited eight-week run (and it really was genuinely limited).