None. Sounds like one line to me. I don't think you'd need any training... assuming you'd listen and pick it out.
Otherwise, I'd say 1-2 semesters. Sounds diatonic, repetitive pattern. Get a part of it, you get a lot.
Doing that how though? After one listening? Joining in playing during that one listening? I could see someone doing that, but it would be beyond what gets taught. That would be a couple semesters still I'd think, but a lot of outside practice.
Ditto for theory. Ear training can do some. Knowing theory that goes along with that ear training will help.