I need my 3 dogs let out for an hour for potty/house breaks between 11:30am-1:00pm. They will need to be watched closely as the two big dogs like to play but can get rough. (I just yell "HEY!" when it happens and they take a minute to calm down and then play again.)
The little pup is blind and might just require you to carry her to/from the yard (she can walk but sometimes doesn't want to). Two dogs are left on the main floor - Margot Doggie (Belgian Mal) and Berlyn (Shiba) - and one dog upstairs - Riff - and he will go back up there when you leave.
They can play fetch or just run around to get some energy out - no need for any training tasks per se, this is just to break up their day and avoid any health problems caused by not being able to go potty.