FWIW, when working with small sample size I try to approximate villain's stats with action in the current hand. So here, the current hand makes this guy a 17/0 instead of a 9/0 and I proceed thinking he is at least close to that number.
I usually do this when you are facing a 3b against someone I think might be an aggrotard. For instance, if they are 5% 3b (1 of 20 opportunities) and is 3b'ing me on his 21st opportunity, I assume they are going to play out as a 7+% 3bettor (idk, split the difference btw 5-10%). Cangurino or someone else who understands the maths can hopefully point out if/where I am woefully incorrect ... I never bothered to read up on confidence levels.
And, yeah, I'm calling this minraise expecting he's more likely got 88+ than a set.