I'm on a very erratic schedule, and usually up late and into early AM, or up during the day, etc. (it varies).
Usually get up, and at least check on them. They get fresh grass (timmy and alfalfa as they are younger) which is taught to be a "treat" i.e. "treeeeat" is what I say constantly in a kinda"wheeeek" exageration whether it's grass or veggies or eating from hand. Food pellets get quickly changed out, water is changed then or later on depending on last change the day before and water level. Usually a few hours later on, they'll get some veggies. I personally split veggies into 2 different feeding times, with various offerings at once. A female I have will basically eat whatever is in front of her. The male, is kinda picky, but slowly getting used to stuff the female took to right away. If he won't eat something, I'll try again in a couple days. If in a herd, they seem to follow the leader and eat what everyone else is eating.
Around 3-5 times a day, I'll try and give each pig about 5-15 minutes of lap time. Personally, I've found draping a towel over my quads with knees together while sitting, and placing one in the leg gap (towel acts like a sling and catches any poop if they absolutely must go or hadn't gone recently before removing; urinating so far has only happened once, after I made the mistake of playing a video online of a "singing" guinea pig, while holding mine and that apparently scared the hell out of him). If they start poking their heads down towards their genitals, they are needing to "poop" and trying to pull it out. That's a good sign they need to go back in the cage, hence the 5-15 minute lap sessions. If they are stretched out while petting, and all of a sudden "shorten up" or start looking around, etc. it usually means time to put them back. Once back in the cage, if you watch them, they'll usually back up to a corner and pee, or will start plopping out poo pellets
Also, I have a TON of 3" white PVC piping in different "T" sections, straight sections, 45 degree angles, etc. that I usually change around about once every 2-3 days. All the pipes can snugly connect to one another, and can be rearranged into different configurations. Almost immediately, each pig will go out and explore after doing this.