So many misconceptions about what an alcoholic is here.
Alcoholics don't have to drink every day. My Dsis' partner is an alcoholic - he hasn't had a drink for 10 years. He's still an alcoholic and would tell you as much, because he can never drink again. He isn't able to take it or leave it the way most of us can.
My late husband was an alcoholic. He went through rehab and didn't drink - but all the addict mindsets and behaviours were still there. He was always an alcoholic, even when he wasn't drinking.
Lastly, just because OP's husband is OK with his drinking, that doesn't mean there isn't a problem. That's the daftest definition of 'not an alcoholic' I have seen in my life. In fact, one of the questions on the AUDIT (which is a tool used to assess alcohol dependency) scores on whether the drinker's family or friends have a problem with their drinking. It's a factor in deciding whether or not there is a problem.
I second contacting Al-Anon for some support, OP. This kind of drinking doesn't get better unless he wants to tackle it, and he doesn't. My husband died at 58, having had two stints in rehab and having lost everything - his job, his house, his family. Nothing stopped him drinking.
The one positive was that my DDs and I got out, and our lives are so much better without him. Be prepared for that to be you.