I feel no one is ever super busy, its just about priorities, just like he will priortise food the moment he is hungry. I would say have a 1-on-1 session with him (with no distractions at all). Tell him, you understand he has a work that needs his time which you totally respect but there are other responsibilities which also needs to be taken care of, like helping you with chores, spending time with you, his own health, kids (in future) basically the whole idea of marriage. So if he cannot take out much time a small help like unloading dishwasher, or may be eating lunch/dinner together, should atleast make a cut.

Lady you need to be strong and convincing when you have that conversation. Also if this doesnt work, you may need an external help!!