weapon glyphs

toxikh.earth89neb18_ESO

can someone explain to me what these mean:
Grants a ‘x’ point Damage Shield for ‘y’ seconds- if this one has 100 point damage shield does it mean that first 100 damage will be absorbed if someone hits me in those y seconds after it has been activated? so if someone hits me with 123 damage ill get only 23 damage and after that shield dissapears or shield protects me 100 damage for y seconds? say 10hits x123dmg i will get only 230damage in y sec?
Increases your Power by ‘x’ for ‘y’ seconds- this one im guessing it increases ur power when u hit with the weapon that was enchanted, so it increases power for 5 sec and if i hit twice in 3 sec i get 8 sec power increase? so if i use a weapon skill is it also increases power?

Keiffo

I'd also like more details on how these things work.

I'd like to know what the cooldown on weapon enchantments is.