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.

https://seer.ufs.br/index.php/prometeus/article/viewFile/1950/1722