Duration
Duration is a stat on gear: how long your status effects and ability effects last.
Sources
- Appears as a base stat on 36 pieces of gear (17 accessories, 15 armor, 4 weapons).
- Can roll as a dungeon bonus stat on 97 items — see each item's Possible rolls section.
Notable items: 
Celestial Staff · 
Celestial Blast Pendant · 
Celestial Greatsword · 
Celestial Yoku Staff · 
Redeemed Celestial Katana · 
Redeemed Celestial Greatsword
Affinity rolls
Duration can also roll bound to a single ability (on gear and relics) instead of applying globally — see Ability Affinity Stats.