Intermittent disconnects

For the last 2 - 4 weeks I've been dealing with internet disconnects.  Usually for 5 or so minutes.  I've had this problem in the past and it goes away for a few months.  It is now back.  Sometimes it will be fine for hours then 4 or 5 disconnects in a couple hours.  I haven't had any success with Xfinity support... yet.  Since I've had this in the past, I replaced the modem tonight but still had problems.  

I can post the event log and status page from the modem report if it would help.  Where can I go for help?  Is there a special phone number or process that I can follow to get to someone that will tell me more than just reboot?