Sex and night shift woes

How often are you having sex with your partner?

My SO (35m) works Sunday through Thursday 10pm-6am, and I (33f) work Monday through Friday 8am-6pm. We have 4 kids between the two of us and they all have evening activities 3 times a week currently. Plus, my SO is taking 2 college courses for his apprenticeship. Our mornings are spent shuffling kids to their schools before I head to work. This shift change started a month ago but this past week my SO got really upset at the lack of intimacy we’ve had. Right now it’s pretty much just the weekends but the longest stretch we went was 8 days without sex. Before night shift we had a really active sex life. We pretty much did it every other day, sometimes everyday but we’d rarely go 3 days without. He accused me of not having a libido anymore but were rarely in the same place at same time right now. And the days we do have time together in the evening, he’s complaining that he’s tired and needs to nap before work. I just don’t know if he’s being unrealistic or if we’re slacking here.