There are a lot of people who will only go when they need it, mostly men. For instance I have not been to a GP in probably 6 or 7 years. But I can see lots of people with chronic conditions (most of which could be prevented or reversed with lifestyle changes) going all the time. And it seems like the kind of thing where once you have a couple prescriptions, you're going in frequently to check in, and each time possibly adding new ones for different ailments you develop.
My Doctor-couple friends said it this way: There are three ranks of hospital: childrens' hospitals are the best. Next are womens' hospitals (maternity etc). Finally hospitals catering mostly to men are the worst, mostly because men are so indifferent to treatment.