How do procs work with toggles/passive abilities?

[khy]

Just wondering about this. Let's say I put Preventative Medicine : Chance for +Absorb into Suppress Pain, a PBAoE Healing Toggle power. Does this mean every tick of the power has a chance to grant +absorb? What would happen if I put that same IO into Health, instead?

 

Or if I put Performance Shifter : Chance for +End into Stamina, does this grant a permanent +End boost or does it mean that whenever the recovery ticks happen I get a chance to get +End for however long?