How many times in a year does a fire rainbow come?

A fire rainbow, or circumhorizontal arc, is a rare optical phenomenon that occurs under specific conditions, primarily when sunlight passes through ice crystals in cirrus clouds at high altitudes. Its occurrence is not tied to a specific frequency; instead, it depends on the right atmospheric conditions. As a result, fire rainbows may happen only a few times a year in certain locations, and they are more likely in regions with a lot of cirrus clouds and sunshine. However, they are still considered quite rare overall.