How much time would it take to recover from a lower 1/3 fibula fracture?

Depends. The location of the fracture is important to when you will be able to go back to activities. The closer to your "ankle" the fracture is the more restrictions you will have. On average bone heals in about 2-3 months everything else being equal. If you smoke or use any nicotine products that can almost double the time it takes for the fracture to heal.