I guess I do it based on how stable I'm feeling. Like right now I'm struggling and it's very difficult so I've asked for two sessions a week and I've found that more helpful for coping.

I have a long term relationship with my T so I feel comfortable asking. I don't think he's ever offered. I just go, "Hey, do you have any openings later this week?"

Today I officially said, "Hey I might need two sessions a week for a while, can we set that up?"