EsliEsma
It would've taken them just a week, if they had an artifact that first causes an eidetic memory to form, then connects it to all previous knowledge and finally stores it in long-term memory. Basically, knowledge downloading from the books. The only downside would be that critical analysis of what's written would be impossible.
Never watched doctor who and unlike the other person I find it feasible to learn four years in a month and a half I can learn a year in a month and keep it to A grade (I've done it) while being relatively unmotivated and I'm definitely not a genius so a true genius I could see 4 years to a passing level in a month and a half