I board about 20-30 minutes away from my house (depends on traffic). Lately I've been going out twice daily almost regularly, but usually I'm just out once a day, every day. I go after work, and I do night feed/check once a week so everyone can have a night off :)
I go out every day because my horse is an R-tard and can't be trusted to eat his supplements if there's two or more piles of hay because he likes to switch piles, and then the other horse eats his supplements and it's annoying >.< So I just feed him totally separately. And I like to fly spray my mum's horse every evening, and my horse too if he is staying out, or bring him in if it is gross out. And both of them need to get ridden :P
There's a few of us at the barn that are religiously out every day, and I'm one of them!