After being Stunned or Frozen, both you and enemies are more resistant to being Stunned or Frozen again.
Repeatedly damaging enemies can cause them to be Stunned.
Stun, Freeze and Immobilisation
Stun, Freeze and Immobilise can be applied right away if you deal enough damage.
If you don't apply it right away, it'll build up on the enemy, making it easier to apply with the next hit.
Once you do apply it, there is a higher threshold for all these effects for a duration, so it's easier to lock an enemy down at the start of a fight, buy they become more resistant the more you and your allies attempt to control them.
The same goes for the player -- if stunned, you're more resistant to further stuns for a time.
The player only stores this for a brief period, so swarm of enemies could stun you if they hit you close together. Big hits are always better at stunning.
Buy PoE Currency Cheap
U4GM: Buy Cheap Poe Currency and Items (6% off coupon: z123). Safe and Instant Delivery. Server: PC, Xbox, PS. Payment: Visa, PayPal, Skrill, Cryptocurrencies. Bulk Divine Orbs on the stock.