I've had two occurrences. The first lasted 3 and half years and the second 6 years later lasted a year and a half. I made some lifestyle changes with more exercise and eating healthier which I think helped the second time around. My PMR has been in remission since late 2018 and hoping it stays that way.

You might find these two articles helpful:
-- 3 Strategies for Coping with Polymyalgia Rheumatica (PMR): https://www.arthritis-health.com/blog/3-strategies-coping-polymyalgia-rheumatica-pmr
-- Diet and Supplements for Polymyalgia Rheumatica (PMR): https://www.arthritis-health.com/blog/diet-and-supplements-polymyalgia-rheumatica-pmr