I’m at a loss and need advice

So I have a job a nanny for a little girl since she was a couple months old. She’s now 16 months and my daughter is 4 months. I have the 16 month old at my house during the week. My husband has off every Monday and Tuesday and we agreed that it was his responsibility to mostly take care of our daughter when he is home those two days.

Well he isn’t.

I have our daughter everyday alone and five days a week I have a 16 month too (10 hours a day). There’s no reason on his days off he can’t help with our daughter. Just because you have off work doesn’t mean you don’t have parental duties. So I have to care of the both of them while he relaxes. When do I ever get to relax?!?!! I feel that the problem is he doesn’t respect my job as a job. I get paid really well by this family and get to stay with our daughter.

Every time I talk to him about it he gets defensive even though I make it clear I’m not saying he does nothing as a father, just that I feel that I need more help and I think it would be fair for him to do so.

I just don’t know what to do. I’m thinking on his days off I’ll take the 16 month old to my moms house and take care of her there. Then come home at the end of my work day like any other person would... maybe if he has our daughter alone those two full days he will understand all the work I do and begin to respect the help I need.