Do doctors see a lot of patients with prinzmetal angina?

Not that many: This is, in its pure form, a relatively uncommon form of cardiac chest discomfort, presenting with characteristic signs and symptoms, and treated with medications, not surgery or catheter based interventions. It's caused by spasm of the coronary arteries, not atherosclerosis. However, in mixed form, the spasm component can coexist with atherosclerosis and exacerbate the chest discomfort.