The next time you have a freeze connect to the router and check the same stats.
if you cannot get to the router and are using wireless, then try an Ethernet cable and if that works, then issue is something to do with your hardware and the HomeHub not getting alone.
Another thing is to try connecting via Ethernet normally and see if you get the same problems.
Wi-Fi is renowned for problems, e.g. I just had to restart one of my routers (have several) as it had crashed to some extent.