Hardcover Collected Editions Question

For a while I was picking up some monthly issues on comixology, but the cost of that started to sneak up on me. These days I've been sticking to collected editions, and I prefer the hardcovers (they're nice and you can get a good discount on amazon). About how long after an issue's first release does it take before you can expect a hardcover release? Specifically I wanna start reading Dr. Aphra and Spider-Man: Miles Morales. How long do you think I'll have to wait for hardcovers?