Count # of Occurrences for specific Reason within 90 Days

I am trying to figure out how to make excel count the total # of write-ups an employee has for a specific write-up from the drop down within 90 days. I can't figure out how to make this happen.

It's pretty hard to explain but I'm sure it's something very easy. I've included an attachment of my File so u can see what I'm talking about. Any help would be appreciated/