What precisely counts as an instance? An episode? A scene?
If the trying-on-the-dressing-gown scene were counted separately, then might not the scene with Ellen pre-wedding also count as a separate instance from the aborted wedding itself? Granted, I personally would count the two scenes as a single incident, but I'm just trying to brainstorm other possible ways that the number could be higher than three (if you count either the ARGH clone or the fitting scene).
Iolanthe, do you recall what the "correct" answer was for the quiz?