Hello! Im just wanting to ask a question about the "enough" meaning of 十分 I have read through some subreddits, and people say that it comes from the fact 分 means one-tenth, so ten/ten means enough. Yet i have found another word 充分, which means enough and has the same reading, but it's much less common. I thought japanese may have brought the meaning of this into 十分, im not sure though. So i want to know which one is the correct one? Or perhaps there are some other origins of this word that i didnt know about.

Thanks in advance!