I rewatched the scene and the first to get hit where the legs. When Freya reached the Knightmare's waist (the cockpit is right after it) the scene switched to Gilford talking to Lelouch/Cornelia. It's possible Freya never reached it or only marginally reached it or that at its edge it wasn't that powerful... I honestly don't know since I hadn't seen the subbed version yet... -_-
(no subject)