From 1969 to 1972 , Frost kept his London shows .
From 1969 to 1972 , Frost fronted The David Frost Show on the Group W ( U.S. Westinghouse Corporation ) television stations in the United States .
From 1969 to 1972 , Frost kept his London shows and fronted The David Frost Show on the Group W ( U.S. Westinghouse Corporation ) television stations in the United States .