Both 毎{まい}回{かい} and 毎{まい}度{ど} share the meaning of "every time" or "every occurrence."
I know 毎回 can be used to mean "every turn", and that 毎度 can be used to mean "frequently" too.
Does that mean 毎回 is more often related to attempting things several times, whereas 毎度 is more closely linked to just things that happen often?