How long does it take to train a…..
“The Master of Arts (MA) took another four years and earned the Master the right to teach at any other university in Christian Europe (ius ubique docendi)—today’s Master’s is usually a one-or two-year degree. Then, for some students, another six to ten years of study culminated in a Doctorate in law, medicine, or theology (the equivalent of today’s PhD): the first two, even back in the Middle Ages, being nicknamed ‘the lucrative sciences’; the last, being rather less well-rewarded in this world, was at least styled ‘the queen of sciences’.”
from “Universities and Colleges: A Very Short Introduction” (Very Short Introductions)” by David Palfreyman, Paul Temple