Is there a list of querty keys NOT used in teh default short cuts list?

It strikes me with that this would be very useful, because instead of the dreaded “This short cut key is already attributed to…..” You could see a list of Keys that ARE available.

Why?: When I am creating a short cut I don’t just want to know that say “Alt K” is available, I want to know if I have other, perhaps more sensible options, say cmd K, Shift K, or even cmd D. C.Q, X or whatever? At teh moment I am fishing in a dark sea.
I feel “blind” to the availabilities at the moment. I think everyone who has not photographically remembered all the short cuts wil also be blind.