I was going to explain my full situation, but I don't have the energy sorry :P
We have 1 day a week which is essentially the weekend for my partner. We generally do stuff as a family that day. Since he works from home, I also take a couple of hours once a week (about half of that our daughter's napping) to go and do whatever I want on my own. I also go out to friends' places/my sister's place (we're good friends) at least once a month. I do this after my daughter's asleep. I could do this far more often (and probably should) but it often feels like a lot of effort at the end of the day.
My partner's happy to look after our daughter any time I want a break. If he worked a "typical" job, I guess I'd take half a day our of the weekend, and an evening here and there for me-time.