Not sure we understood each other well here. My intention is to display the number of domains on the blocklist for which queries have actually been blocked. Or in other words, what domains on the blocklist have been requested by your network's clients.
Example: You have a gigantic blocklist of 5 million domains. However, in reality you need far less to effectively block ads and other unwanted stuff. Such tool you help to identify the domains need to be blocked (by identifying which ones have been requested by your client).
I think this is interesting, quantify the numbers and identify the relevant domains blocked.
(for more info, see here: Which adlists do you really need? Here is the answer (Script))