Dax Calculation

To find out how many times a Job ID appears in my Data set, I used the formula

COUNTROWS(FILTER('Engrs Timesheet', EARLIER('Engrs Timesheet'[Job ID],1) = ('Engrs Timesheet'[Job ID]))) in the column VISITCOUNT2

I further want to streamline my analysis to count only job numbers that appear multiple times on different days and (not on the same date)

So here is a sample of my Data

I want to write a function that counts the number of times a Job number appears into the VisitCount2 column, but I only want it to count it as two if the job numbers are not on the same On-site date.

That is D0000178 should be counted as 3 rather than 4 because two of its elements have the same On-site date (11/10/2021) same as M00002062 which should be counted as 2 instead of 3 because two of its elements have same On-site date (26/10/2021)

 
Thank you all