In terms of loudness and pitch how would you compare the sounds made by a mosquito flying near your ear and the croaking of a bullfrog ?

This is what i found on google “lithium and sulfide can react together to form litium sulfide(li2s). when lithium sulfide hydrolyses(breaks down) in air, it releases hydrogen sulfide which is characteristized by a rotten egg odor.” i hope this you for what your looking for