In Classic

Yeah, currently only ccs resulting from actions are tracked except for the ones listed in the readme. The reason was that in vanilla the combat log event for applied debuffs was missing some important information which made them inaccurate. Classic doesn't have this limitation though so I will soon add them all.

Could you tell me what the debuff resulting from frostbite is called please?

The debuff is also called Frostbite

thanks, added it.