DB query Target usage

Hi,
Due to historical and practical reasons we have alot of connections multiple times.
And possible quite some connections that are no loger used.

is there a query to find out what is the number of "made connections" to a target and the last time that connection was used ?

This will probably be limited to the settings in the log option, but still this would be quite handy.

We are running on SQL server, so a Tsql would be much more interesting than through a menu option.