Ok I did a bunch of calculations using one of the texas holdem calculators, and from what I noticed is this:
Any 2 LIVE cards, unsuited, like 93 off, 72 off etc. have about a 10 to 12 percent chance to win against pocket aces. For every random hand that has 2 live cards the chance that the pocket aces will hold up drops by the same amount, ie. 10 to 12%.
2 examples:
AA vs 93 offsuit
AA 87%
93 12%
AA vs 93o vs 72o
AA 75%
93 12%
72 12%
Suits come into play obviously, against suited cards:
AA vs 93 suited
AA 82%
93 17%
AcAs vs 93d vs 72h
AA 67%
93 17%
72 16%
Hope that helps.