Except for special events and holidays such as free-fishing weekend, they tend to consistently stock most places on the same day/time. ABC is Thursday at 11-12ish, near the back of kowloon (on the opposite side by that outflow grate), near the dog park parking lot, and (I assume) farther up in/around the pond.
I used to bicycle commute through there when I lived at Duck/Chase Village, and would see them there pretty much to set my watch to, outside of special ODFW family events, and holidays (then they seem to hit it Mon/Tues).