Or never. Dammit! I’m a rebel, not a doctor @Havenstone ! 
It also seems like any useful healing will require extended studies, that in the case of my mc would be better spent actually leading the rebellion and maybe reverse-engineering air-rifles and finding a way to mass-produce them. Or reverse-engineering or even designing our own printing press so the rebellion can more effectively educate people and spread propaganda.
I imagine a novice theurge, like the INT2 mc who just tries whatever would fall into the last category and only heal the skin while the blood-supply lasts, which is not a good thing.