I started with hour-long weekly sessions. When my speech therapist noticed i had made improvements, we toned it down to twice a month, and then once a month. I’ve had so many sessions i can’t keep track of the amount i’ve had. But my speech therapist and i are somewhat friends so i see her once a month to catch up. So once a month we do upkeep and finetune stuff, for example some months my talking speed needs to be lowered, next month my pronunciation needs to be improved.