How to dynamically aggregate member purchase frequency

Hi, I am quite new to DAX, and I want to aggregate member purchase frequency dynamically.

So I have a dataset which looks like this:

Now, I have a basic level aggregation for purchase frequency, which is dynamic to the "date" and "rule" filters, like below:

But I want to aggregate this further, to only "Frequency" and "Member count", like this:

Do you know how I can achieve the last one, while still keep it dynamic to the "date" and "rule" filters? Any suggestions would be highly appreciated.