Enchantment Proficiency
In-game, Enchantment Proficiency is simply referred to as "Enchantment"; however, the name "Enchantment Proficiency" is utilized in the wiki to help distinguish it from the Enchantment recipe.
The effect of this innate skill is applied when you use the Enchantment recipe to Enchant an item at the Alchemy Station.
Effect
+7.1 Alchemy Enchantment Level
(effect increases with skill)