getInternalCooldownMillis
Minimum time in milliseconds that must pass between successive procs of this skill for the same player. Returns 0 for no internal cooldown (the default — proc is gated only by getProcChance).
Override for procs that deal large burst damage or have heavy side effects, to prevent autoclickers from spamming them faster than a legitimate attack cadence would allow.
Return
Internal proc cooldown in milliseconds; 0 disables the gate.