For us, dh generally does 3-4 hours of relatively structured stuff a day. When that happens in the day depends on the time of year, in winter it is first thing in the morning, when it is cold and miserable outside, in summer it is often in the middle of the day when it is too hot out and about.
This includes reading, writing, a fair bit of maths, and often some music. He would love to keep it to about 2 hours a day, which should be plenty, but the dc generally demand more and he is reluctant to fob them off.
The rest of the stuff we tend to do informally during the rest of the day. That would be languages, and all the other subjects which are done in more of an 'unschooling' type way, where we talk about things and make them games rather than sit down and do them in a set way.
It is probably nothing like many people's version of unschooling really, it involves things like memorising the periodic table, but is dome more in a child led way and as a game and if it doesn't get done on any particular day it's no big deal.
The dc also spend a fair bit of time in the day on their own doing music/drawing while we work. I sometimes sit and draw with them, or we do an art project of some sort.
In summer they do less stuff inside and more gardening, veg growing and playing around outside.
At the end of every day we watch part of a documentary. Today we watched part of Origins of us, which continues the story we have been watching on evolution (started with First Life, then Rise of Animals, Walking with Monsters, Planet Dinosaur, Walking with Beasts, now Origins of Us, will follow with The incredible human journey).
We don't try to get them to learn what's in the documentaries, we just have loads of them and watch them over and over again and they go in. And the dc love them too.