The frequency of hangboard training in your climbing routine depends on your current climbing level, experience, and recovery ability. For beginners, it's generally recommended to start with 1-2 hangboard sessions per week, with rest days in between to allow for proper recovery. As you progress and your finger strength improves, you can gradually increase the frequency to 2-3 sessions per week. However, it's crucial to listen to your body and avoid overtraining. If you experience excessive muscle soreness or joint pain, it may be necessary to reduce the frequency or intensity of your hangboard workouts.