😂 @C1N1C you and I haven't met the same men! There are millions of men who do absolutely anything to get out of any childcare whatsoever. That's fairly well known I would have thought.
Simply op, the amount of hours you can do, will depend entirely upon how much he is prepared to take on in the home/kids. And also how much effort you both want to put in to your dc.
Walking to school, cooking food from scratch, driving to and organising daily extra curricular, helping home work, decent stint of reading every day, tidy house can easily be 8 hours work.
Of course it can also be very few hours too, with only screens and chicken nuggets.
So it depends how you want to/can afford to bring up your children.
For my own life, I found that working 10 hours a week only during school hours,with me doing the vast majority of house and dc, was about the right balance between me and my dh putting the same amount of effort in.
Any more hours for me working in the week and he would have had to do more in terms of home/dc which he didn't want, and neither did I.
So yes, a discussion is to br had but he needs to know what the tipping point is of hours which would require him to up his game at home. This will be entirely your own family dependent.