A reason I don’t think defining witchcraft as some antipathy to the Catholic Church is helpful in considering the question, is that my understanding is that documented cases of persecution of witchcraft were more common in Protestant societies after the Reformation at least. The Inquisition, or at least the Holy Office in Spain which is most notorious, was ironically generally skeptical of charges of witchcraft at least according to Richard Kagen recently and other historians before him. Kagen’s work is perhaps revisionist, but not on this point, which is pretty well documented, something unfortunately rare in so many of these cases. Specifically, the Inquisition’s investigations of charges of witchcraft seem to have resulted in acquittals on those charges most of the time, and their minions were instructed to be skeptical of such charges from 1500 or so on at least.

The case of Joan of Arc is certainly interesting, as she was surely charged with consorting with the devil. Several decades later, after one of the most thorough investigations of which we still possess the records, the Vatican made her a saint though. I think even in the 15th century everyone would have agreed she was burned for being a French patriot by the English. While it is surely true that unscrupulous people like King Phillip of France made use of such charges to justify their persecution of all sorts of people like the Templar warrior-monks, what is interesting from the perspective of recent times is the extent to which a genuine fear of witchcraft and magic motivated popular hysteria or legal actions that led to such killings. No one believes that Phillip went after the Templars because he thought they were consorting with Satan.

The bottom line on this question is that the sources we have are inadequate to answer it with any real certainty. Mortality came quicker in the medieval world, as did violent death, but the motives of the killers will forever be obscure in most cases. It can be said that many people found such charges credible, and attributed things they could not understand to the practice of witchcraft in those times. It is hard to conclude, however, that the victims were actually a group of people who would understand why those people in our times who call themselves pagans or wiccans claim them as martyrs. Their doing so seems mostly related to the modern understanding that being a member of victim class can often be turned to account in argument or making claims. I don’t think the people who were burned would have had much desire to be classed as anti-Christian, and probably died saying Christian prayers in the overwhelming majority of such cases.

My youngest sister and brother never found anything like that and they were about that time.

300 towns x 400 years x 1 “witch”/year/town
= 120,000 “witches”

That’s assuming they only killed one witch per year in each of these towns, which is ridiculously low.

300 towns x 400 years x 100 “witches”/year/town
= 12 million “witches”

And even this number is conservative:
-more than 300 European towns had witch trials (Eastern Europe had huge numbers too)
-the European witch trial craze lasted for more than 400 years
-we’re not even counting any miscellaneous genocides and heresy accusations that came under the umbrella of witchcraft
-why stop at Europe, when people are still being killed in various places around the world for witchcraft today?
-why stop at Christianity? Islam has persecuted “witches” with very similar motivations, and let’s not forget the slew of non-monotheistic cults that did so since times immemorial

but yes… as far as the number of people, especially women, that Christianity killed for “witchcraft”, it would seem the answer is in the MILLIONS.