I pretty much do it all Monday to Friday, as DH works long hours on those days. He is never home for bedtime (we have two small DSs), and has unreliable hours, in that sometime she can be home at 8 pm, other days not until 11 pm. And he invariably works in the evenings even if he is home. As do I, BTW, with all the household stuff like cooking, washing up, laundry, tidying, and everything else that goes with having a home and DC.
I work 3 full days a week (weekdays). I am constantly exhausted. We do have a cleaner and ironing lady though, and I wouldn't manage without her. Well obviously I would if I had to, but it would be hard going.
I feel like a single parent Monday to Friday, but DH does as much as he can at weekends. He doesn't see things to do IYKWIM, so he wouldn' necessarily do laundry, hoover etc, but he always plays with the DSs, takes them out, picks up any groceries that we may be low on, stachs and unstacks the dishwasher, feeds the DSs, does bath/bedtime with one of the DSs, and I do the other DS.
I think we both work, whether it is inside or outside the house, about equal hours over an average week. I think. I've never totted it up. But we both pull our weight.