My Winter schedule differs from my Summer one. In Winter the dogs come horseriding with me about once a week, the ride is about an hour, plus an hour either side of the ride, walking around, getting ready, packing up etc.
I have been working till dark the last 3 weeks, so we have been going for 20 minute bike ride runs in the evening.
On the day of the weekend I don't ride they go for a 1 and a half hour walk.
So in winter its about 8 hours a week.
In Summer its double that