As I stated, I am not fully bought on this analysis, mainly because I think plenty of people possibly use "free of" and "free from" interchangeably—besides in the case of "free of cost"—or arbitrarily want just one or the other sort to express exactly the same idea, without having any https://docs.google.com/document/d/e/2PACX-1vR1aRmbt0UmT4gxVq4IXbfDVfh2KrMfGfIz30gs2kLcIKk8h4EVktV5g2U8cNCzOTBSOZHhUqlkGaRY/pub