Frequent Internet Dropping

My cox high speed internet, is constantly dropping the internet and re-establishing connection.  Seems like it does it 3 or 4 times an hour.  Very frustrating. I upgraded to a Netgear Nighthawk Modem-Router.  Which is on the high end of Cox's recommendation.  This is not a WiFi issue as my PC is cabled to the Nighthawk directly.

Had a tech come out 6 months ago, he boosted the signal strength thinking that would fix it.  But it is still happening.