So at my last job we had an AM deployment and a PM deployment. We had code reviews, QA, a slow roll process (deployed to three servers), monitoring process, and once everything checked out we fast rolled to the other servers.

At my current job we have a QA process, and we deploy once every three weeks.

My first job I deployed as needed, with no QA at all (I was the only web dev there).

I'm currently at a major e-commerce site, my last job was more of a click-bait site (though it still made millions in revenue each year).

So my question is: is there a "normal" as far as deployment schedules? I realize that each business type is going to have their own needs, but what's the "average" time between deployments?