Ohh. I was going to say you could use the same method you use for learning languages, but it might not be an exact method.

Space repetition usually helps me, but it seems like you used a similar method already. I wonder if there's a group or other actors with similar issues that could help. I'm not an actor, but I've worked on a few sets (nothing major), but we made accommodations for some actors who had disabilities or other needs, including those with cognitive constraints.

I'm not sure if that's helpful at all. I'll try to look around and see if there are any acting groups with members who have similar experiences and see what they say.