I believe the specifics on that is about 60 frames, which is about enough time for 1 or 2 aerials. You're gonna be more likely to get an ABK lockout if you use 2 aerials/specials in between ABKs and you DON'T buffer them (ex. ABK > Witch Twist > DJ Fair 1 > ABK should work, but w/ out correctly buffering and timing you "lose time" in frames and can get locked out.) 1 will always be fine considering the FAF on Bayo's combo aerials are all right around 30 frames.
In the link you posted Salem does ABK > WTw > DJ into the full Fair combo, which is well outside the 60 frame window. That combo kills, but is a suicide combo for that reason and also because you burn your DJ doing the Fair combo.
