When I'm well there's no reason for me to call, though I may email on rare occasions. If I'm struggling, I would probably email once between weekly sessions - my t will always reply to my emails. If I was in a crisis, I would call instead of email. The most I've spoken to my t is 3 times a week, bur usually less. If in a chronic state of extreme crises I would email my t maybe 2 times a week (excluding replies). Having said that, I'm doing okay at the moment and have only initiated contact with my t once in the last 6-8 weeks (my t did initiate contact me once during that period to organise our schedule for the following week).