count NUM_PERSON per DATE_ACTION if NUM_PERSON is already exist in the last 7 days

[brunobertels]

Hi all 

i need to count per DATE , the number of Client who has already call in the last 7 days 

I put here a sample with only 2 dates but the calculation should works for a 7 days period per date 

CLIENT	04/01/2021	05/01/2021
3102078	1	3
3706430		4
3532396	1	3
3307200	1	3
238988	1	2
405407		3
306068		3
303518	3
230331		1
274913	3
817600	3

Her you can see that i have for the 05/01/2021 8 Callers but 4 of them has already call the 04/01/2021 

So my distinct count of caller is  8 , but how to get those who called the 05 /01 and in the last 7 days ? 

Thank a lot for your help 

i tried with set analysis , P function but without success

Regards