I text with T for several different reasons, primarily: to let her know about something going on, scheduling changes, and to ask her to call me. When it's the first, she doesn't always respond, but sometimes does. In terms of how often... probably happens about 5 times/week. And how did it start--she prefers me to text and ask her to call her back. Also, during the workday it's easier to tell her something via text instead of email since she checks her phone very often and less so with her email.