A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I think this is very difficult to solve with formulas or maybe impossible. The reason is that your data shows the same name in multiple rows.
A possible way is to load the data into Power Query and unpivot the day columns, create a Pivot Table and now you can count anything pretty simple.
Give me a sign if you're interested. EDIT: Just to demonstrate the benefits:
Andreas.