"The patient with a 10-session cycle texts me every week for the next one."
The hidden cost: every week you lose minutes squeezing in a slot you could have booked once, and the patient risks skipping a session if you don't reply in time.
What she does: she proposes the whole cycle right away — 8, 10 sessions spread across the week — and books them all into the calendar at once. The patient already knows when they're coming back, and you never think about it again.