Info on Wiki is way off from my experience with Chonchon over the last couple days.
so far 2/4 with TH1 on his belt. I have seen him pop high on the hill and low in the valley, and every time has been at either 60min, 70min, 80min, or 90min of ToD on the dot. Treat it like you would Fafnir, but once window opens 60min after last kill, he has 10min windows rather then 30min. Every kill it has poped on that 10min mark to the second.
XI Wiki



