To clear up things, there are two types of corrosion: airframe corrosion and engine internal corrosion.
That was extremely helpful, thanks, Hung! I had not realized that time of each flight is crucial, more so that the total number of hours. I've also been focussed primarily on cylinder corrosion, I had neglected to consider the airframe.. While hangering is a good guard against corrosion, it'll be good to ask the A&P to check for airframe corrosion - especially after seeing the picture! Thanks again..
