Features Counting

do you mean associatively? i assume you know how to search for holes with the CNTL-F find tool and how to make a parameter in the normal UI.

I kind of assumed you could create an analysis feature using the Find tool, but I can't see that it's possible. If you make all the holes in patterns there are parameters in the patterns that indicate the number of instances. You could add those together into a parameter using relations. But for that you need to identify the specific patterns, so it's not a very universal solution. If someone adds a new pattern, it won't be included automatically.