There is currently no such report in HealthFrame v2. One could create an OpenHealth service plugin to create such a report, but it wouldn't be easy, because the XML data representation of calendar items is normalized, and doesn't redundantly include computed calendar entries which are typically the majority of entries.
This issue has been raised before, and is in our bug tracking database (#752). We don't expect this to be resolved for the HealthFrame v3 release (we are trying to limit new features to get it out the door) - but its a reasonable feature we may add for HealthFrame v3.1, depending on user feedback.
Thank you for your suggestion! If you - or others - feel this is particularly important, please let us know, and why, and we will adjust the priority according to the feedback we receive.