@Orca It means high speed brute force beyond the intended rate of unlock attempts. For the Android side of things, they just call it brute force.
They could keep trying new passcodes for a Pixel 6 or later after a BFU exploit but they say brute force isn't possible as in they can only go at the incredibly slow rate the secure element allows which is 1 attempt per day after 140 failed attempts. Pixels do this part better than iOS. They've got a fantastic secure element since the Pixel 6.