Simple little WeakAura that tracks when a defensive cooldown is up on an enemy player while inside of a Battleground. It then tells you the duration of that defensive, and who the player is that got that defensive on them. To add more to track, just go under Trigger -> Trigger 1 -> Exact Spell ID(s), and you can add/remove spell IDs that you'd like to track on enemy players. You can also track their debuffs by adding Spell ID(s) to Trigger 2.