21.   Once in a great while, a natural history book changes the way people look at the world.

22.   Once in a great while, the dialogue turns simplistic.

23.   Once in a great while, a horse survives the first two brutal legs of the Triple Crown with a chance at glory.

24.   Once in a great while, a subatomic particle from the epoxy will zap a memory location in the chip.

25.   Once in a great while, as Ken reminds us, Composing would send something back through the same route, but nobody had prepared me for this contingency.

26.   Once in a very great while, a company breaks through and stands on its own as a profitable business with a pipeline of products.

27.   Russia has withdrawn its talons and, except for the need to vent some nationalist rhetoric once in a great while, it offers little threat to the world.

28.   He tours only once in a great while, but is now able to do so in comfort.

29.   Once in a very great while, Stockton will let his guard down and provide a glimpse of the competitive emotion that burns within.