How to create a ranged frequency table using Excel Cube functions - excel

Question

What I want is to create something like this (see image) in Excel that pulls in the frequency of my chosen category from a table within my PowerPivot data model. The output would also need to be dynamically filtered via a cell reference.
Using the below data set as an example:
Week 1 A
Week 1 A
Week 1 A
Week 1 A
Week 1 A
Week 1 B
Week 1 B
Week 1 C
Week 1 D
Week 2 A
Week 2 A
Week 2 A
Week 2 A
Week 2 A
Week 2 A
If I filtered to Week 1 through my set expression, the following output would be produced
1 2
2-4 1
5+ 1
However, if filtered to Week 2, this output would be produced
1 0
2-4 0
5+ 1
I say 'set expression' because I am assuming the way to do this is through the CUBESET function possibly with a MDX FILTER function and the CUBESETCOUNT functions though I am open to other suggestions. Even though the example doesn't show it, I need the expression to filter multiple dimensions from my cube, in particular, date, which is found in my calendar table.
I also understand that I could create specific measures within PowerPivot to handle this (sample formula below), but I would like to know if this is possible via the CUBESET function.
Freq (5+):=CALCULATE(
DISTINCTCOUNT([myColumn]),
FILTER(myTable,
COUNTROWS(FILTER('myTable', [myColumn] = EARLIER([myColumn]))) >=5 )
)
I am also open to creating a helper column within my Powerpivot table.
Thanks,