I'm not entirely sure I understand the answers.
Does "low power, high frequency" (just to pick one option) mean that there are definitely lots of Wizards (or whatever) but none of them achieve great power? Is it valid for there to be some who achieve great power as long as most never get terribly far in?
For my Jewel of the Desert setting, the use of magic is relatively common, but it almost always requires specialized training, with certain rare exceptions. Specifically, anyone can learn to become a Wizard, but it takes the equivalent of a lawyer's or doctor's education to safely practice it outside of the laboratory/workshop, and such folks are called Waziri mages because they're all part of the same society (the equivalent of the American Medical Association.) Anyone can learn to be a Druid or Shaman, but without a firm foundation of magical knowledge from some other source (such as basic Waziri training), it takes years of study and meditation. Anyone can learn to be a Cleric, which in this region almost always means a Safiqi priest, but it requires significant, concerted effort and a deep commitment to the faith. Etc.
People who can practice magic are common, but people who can practice powerful magic are rare. The vast majority of Clerics can heal people a few times a day; the vast majority of Wizards would struggle to cast more than a couple fireballs before running out of mojo, etc. Everyday magic is mostly centered on magic items (which are plentiful because the party is based out of the largest city on this part of the continent, and the de facto trading hub of said continent), or on alchemy. So...it's hard to choose any particular answer. It is possible to become very powerful, but there are always prices to be paid and commitments made to get there. I would not call it "low" magic, but I would not personally call it "high" magic either--there are plenty of folks for whom "magic" is something that hardly touches on their daily lives, even though it is a big deal.
(I mentioned earlier in-born talent; this is primarily related to genies, and their descendants. Much of the Tarrakhuna region has genie ancestry because the mortal races were kept as slaves by the ancient genie-rajahs, before the noble genies departed from the mortal world for the elemental otherworld they now primarily inhabit. Because it's been thousands of years, the genie blood is pretty thin in most modern humanoids, but a small number of people manifest it more strongly than others or encounter some kind of magical phenomenon that activates their magical potential. Such a person--a Sha'ir, or "sorcerer" to use the colloquial term--is capable of manifesting elementally-focused magics, but these differ from Waziri magic and are much less...formal. More like bursts of elemental energy, though fine control can be possible for people who really work on it.)
