Sometimes even people who live or work right down the street from my office will ask this question.
If you are asking yourself this question, then I might ask you whether you actually have more power than you think over your time. Issues about power and authority, and the feelings which accompany them, turn out to be absolutely central for some people, and sometimes these issues make their first appearance in a concern about scheduling.
A question about making the time may also be an expression of hesitation.
Finally, asking this question may also be expressing the sense that a demand is being imposed on you. Such as, “If I do psychotherapy then I will have to change X, or deal with Y, or stop doing Z.” The first demand that some people feel is the demand on their time.