With my T, it depends on the day/time and method of communication as to how long it takes to hear back from her. Email - during the week, she usually replies within 24 hours. Emails sent Fri-Sun are replied to on Monday. Calls to her office phone during her office hours are responded to same day, usually within several hours. Calls to cell phone are responded to within 2 hours or less. Texts are usually responded to same day.

I've contacted my T several times in one day, but only when it's been an emergency. Usually, I know when I can expect a response from T and can wait for her to get back with me.