My hubby mentioned "not being together" but very rarely if ever actually used the term divorce, that was more my style in the beginning when I first moved out. Even when we would have horrendous fights (some you have read about here and others before I started posting here) he would not say "I want a divorce"
I can't remember him saying that ever.
I don't think that means very much to your situation though. Mine is very different. My hubby was never really a true WAH I don't think, looking back. Maybe like 75% WAH, 25% fed up and confused. I don't know.
Just because your H throws the term around does not mean much. I used to say it to my hubby all the time when we would fight. I'd pack my bag and scream "it's over, I'm divorcing you!" or "the papers will be in the mail!" Ugh. And yet I am here everyday and working on myself and my marriage. So words really do not mean much. Try not to get too upset about it. We all say things we do not mean. Some more than others.
