Hey, Ridley, ya got any Beeman's?

The 45 min hold at T-9:00 is standard. It's used for making up time if they take too long on some pre-flight procedures. I think there is a 10min scheduled hold in there at about T-20:00 as well. Why is it not included in the countdown? Because they can chose to use all the 45 min, or only some of it.