Measure to calculate how many times the same item occured in past weeks

[Cactus26]

Hi,

I need to find a way to calculate the measure which will count the number of items which occured more than 2 times in last 2 weeks. We need to check just items from current week. It should be made as measure as the output will depend on filters.

Week	Item	Occurrence
1	abc	2
1	abc	2
1	cde	4
1	cde	4
1	efg	5
1	uut	2
1	ooo	2
1	efg	5
2	ghi	3
2	aaa	1
2	cde	4
2	cde	4
2	efg	5
2	efg	5
2	ghi	3
2	lno	2
3	uut	2
3	ooo	2
3	efg	5
3	ghi	3
3	lno	2

Occurence column show calculations (Countif). We are in week 3 and items which occured more than 2 times are: efg and ghi. So final measure should show 2. As two items from current week occured more than 2 times in past 2 weeks (including current).

Thank you!