T1, I hardly ever called .... I would rather see her than call her, though I did if it felt particularly urgent. She never wanted to be on the phone too long, because she didn't care to do much 'work' on the phone, I think. It was typically 5 minutes for a phone conversation with her.
T2 was different. I didn't want to call her and 'bother' her either ..... but once I felt really upset about something and called her. It was right after she left work and the next thing I knew, we had talked for almost 2 hours - I was so amazed she gave me all that time! I didn't think that would be a regular occurrence though, that she would allow long phone calls as a general thing, but it turns out, she does do that on occasion with certain clients whom she deems do need that extra time outside session to go over things or deal with things. When I would question the time she had spent with me or say I felt there should be some sort of compensation for her giving me 2 or sometimes 3 hours of phone contact some weeks, she said she considered it part of her obligation to her clients to be there in that way (and that most didn't need or want that, but there were 2-3 who did seem to need that extra care/time), that she had always done that if it seemed needful and that it was better to do that and avert a crisis ....
It got to the point where we seemed to accomplish more on the phone than face to face! I guess some things I felt more free to share on the phone, because it removed some of the vulnerability factor for me, I think ... my voice could still be heard, but my eyes couldn't be seen.