My therapist is fairly responsive. If I call her on Monday, for example, then she will get back to me later that day. She will rarely call me back on Tuesday. So, she pretty much responds the same day and makes time to talk to me for a few mins if needed.

My pdoc has a stupid assistant who gets in the way, so I can't actually talk to him outside of appts, and half the time, his assistants get things wrong, so I really don't bother unless it's something critical.