They regularise in a way that is 'inversely proportional to the square root of their frequency'. This means that if they are used 100 times less frequently, they will regularise 10 times as fast and if they are used 10,000 times less frequently, they will regularise 100 times as fast.Basically you figure that if it's a word we don't use much, it's not worth remembering that it has special conjugation.
My computer got spoilt.
The radiator of my car always gets spoilt.
The calculator I bought looked good but got spoilt the next day.
posted by pick_the_flowers at 2:44 AM on February 4, 2011