It depends on what your experience level and training history is but as a general rule of thumb prioritize frequency and consistency over intensity.
Treat handstands as a skill (a skill with a very evident physical component that also needs to be understood and addressed)
If your practice sessions are super intense you will get too tired and be unable to recover well enough to keep the quality of your skill and drill work acceptable throughout the week.
Sloppy practice equals sloppy results.
This is a practice where small details, focus and intent play a very big role in progression. Do not mindlessly fling yourself up, over and over again expecting a different result.
Slowly increase the amount of workload you can handle, especially if you are new to the game. The easiest way to injure your wrists is to go from ZERO to practicing 5 days a week pedal to the floor.