I thought he meant how likely it is that KK lose against 88 three times in "less than on hour". To me that sounds like "If I have KK and the opponent has 88. How likely is it that I lose?" Besides a set the opponent might make a straight, a flush, a better full house, quads or any hand that would beat the hand with KK. And according to twodimes.net the probability for that is about 19%.