so when kids were small,
when both at home, both responsible, so if i'm cooking dinner he is bathing baby.
No-one sits down until all jobs done, between us.
weekends 50/50 in terms of who gets up, who is in charge of kids, jobs that need doing, food cooking, nappies etc.
But for us, during the week, as I was at home and he was at work, and our kids were fairly laid back, I did a lot of the cooking/cleaning/laundry during the day (or not, house was never spotless). So it was basically what I hadn't got done we split between us evenings and weekends (or left it undone)
I did night wakings during week, and we split them at weekend. (but all of ours were sleeping through at 10 months)
I would say though, that my introverted dh did much better if he came home and had half an hour to read paper and just re-group. I remember my mum was the same, so it is worth making it happen as then he has energy to be full on rest of evening.