My son have OT at TKO hospital and wait for 6 months. The frequent is about once per 3-4 weeks and 35 min for each lesson. It is shorter than the private one but it include the music therpy.
I do not know the reason but I think my son need the service very much. Maybe there are a number of children also need the service. My son have PT training at hospital and the frequent is also once per 3-4 weeks.