Hi OddWalnut,
These are truly the most difficult relationships, none are harder. And when there are young children involved, it just makes things all the more challenging.
If you can abide the conflict for a bit longer, it might be worth putting together a watertight plan to exit safely, not only for you but for him. We can help walk you through some of the things to think about.
I waffled for four years, then planned in earnest for a full year, though my ex is what might be considered high on the high-conflict spectrum (also a former trial attorney ). I managed to stay one step ahead of things because I had a plan when the wheels came off, and it made all the difference. If I can do it, you can too

What does your H say when he threatens violence? Does he work outside the home? Does he abuse drugs or alcohol?
We can also help you learn some ways to contain the emotional arousal that makes things go from zero to 60 in three seconds flat. It's a lot to handle at once, and fortunately this is a great community to support you through the hard times.
LnL