Count number of links going to an Initiative

Dear EazyBI Community,
I have a question regarding Epics and Initiatives. My goal is to count the number of Epics which are linked to a certain Initiative. I solved this by counting the number of links which go from an Initiative to an Epic. Unfortunately, this, let us call it, top-down approach is not the correct way for me, because it limits the way I can filter based on epic properties. Therefore, I want to solve this with a bottom-up approach, starting with the links from an Epic to an Initiative. Now, I am questioning how the number Epics belonging to a certain initiative can be counted?
Many thanks for hints to solve this issue.