As I mentioned, I am not completely marketed on this Investigation, due to the fact I do think the majority of people either use "free of" and "free from" interchangeably—except in the case of "free of demand"—or arbitrarily prefer just one or the opposite form to specific exactly the same https://docs.google.com/document/d/e/2PACX-1vR1aRmbt0UmT4gxVq4IXbfDVfh2KrMfGfIz30gs2kLcIKk8h4EVktV5g2U8cNCzOTBSOZHhUqlkGaRY/pub