My night is during the day and I sleep. Everything else I fit around my work hours. I try to sleep while kiddo is at school so maybe 3 hours there as it takes an hour to and from school with public transport. Lately I have been giving the house a good clean on a Friday night and while my mum watches kiddo on the weekend while I work, she will do things I haven't been able to do like the ironing and folding.
If kiddo isn't home and I have to work, I sleep if I can once he has been picked up otherwise I have to wait til he goes to bed so I can rest for an hour or 2 before work.
The nights I don't work, I go to bed late and up early but I try to catch up on sleep if it's possible too. Most of the time, I just lay in bed because I can't make myself sleep.