How frequent is commotio cordis in athletics?

Commotio cordis is a relatively rare event. There's a registry that started several years ago, and there's only been documented near 180 to 200 cases. Although that's thought to be relatively low due to often this being unreported or an unknown cause of the event. Although it is relatively rare, it is increased in sports such as baseball, softball, martial arts. But can be a part of lacrosse, hockey, football, and virtually any other sport as well.