Dravynea's Frost Salts is a Radiant Quest in The Elder Scrolls V: Skyrim.
This quest can be obtained and completed multiple times & each time you will receive the training. An unofficial skyrim patch can fix this.
Dravynea the Stoneweaver will ask the Dragonborn to bring her some Frost Salts so she can make a potion to tolerate the heat inside the mine better. By some, she means 1 pile of Frost Salts
Frost Salts can be obtained a number of ways: Defeating a Frost Atronach, samples can be found in the College of Winterhold if you are a member, creating some at the Atronach Forge
1 Skill point in Alteration