I think there are no hard and fast rules that can apply to every couple.
I think the most important thing is for there to be an agreement and discussion about what things should be done by whom. The point is that negotiation/discussion should leave an end result that is both fair & satisfactory to both people. That INCLUDES taking into account hours spent doing various things like outside breadwinning jobs, part time jobs, housework, childcare and transportation, yard work, shopping, cooking, pet care, taking out garbage, etc. All are essential work to lead our daily lives normally.

DH and I sorted it all out when we moved in together and worked out the labor sharing to our mutual satisfaction. By "labor", that includes BOTH money making work and the also essential work required to maintain the house, get and prepare food, etc. We also are happy to "cover" for each other if someone wants a break from some chore or doesn't feel well.