I am always very cautious about making my horse's training schedule varied enough so they don't get drilled on or bored with any one workout. Once we're back to riding, I usually aim for 2 days a week jumping, one gymnastics and one coursework; 1 day of groundwork (arena); 1 day off; 1 or 2 days of flatwork, and 1 or 2 days of hacks, either long and slower or short and faster, depending on the time frame, etc.
So it's usually 4-5 days in the arena, 1-2 days outside. Though sometimes I move the jumps out to the fields, or work in the XC field, so that's outside the ring.
I just really don't want to make any of my horses sour on ringwork.
How many times a week do you work your horses in the ring, and what do you do?