I came across this article which discusses what Hadot calls “spiritual exercises” in some depth. The author takes exception to that label, but I think it suits just fine. I had recently joked in a conversation that if I had a dollar for every scholar who said something along the lines of “I won’t detail exactly what the exercises in Epictetus are…” that I’d have a goodly number of dollars.
Braicovich does not say this, however. He notes 18, although (spoiler alert), he later pares that down significantly. Either way, it’s worth the read.