Hi Jess,
I think you should use 1-* in this case, and create an Attribute “Site” in the Entity “Coun”t that uses the same Enumeration. Also you can set validation in the domain model, as “Site” should be unique in Count. After that you could loop through your ClaimsBrief list, check if a Count exists with the same enum value, if not create one, if yes Number = Number + 1
Hope this helps!
Best regards,
András