Many, many years ago I grew far too many runner beans and went and bought a chest freezer (back in the days when freezers were only just becoming available to common folk). We froze a helping just to make sure they froze OK, then took it out a few days later and, lo and behold it tasted pretty much like freshly picked runners. We froze enough to feed the five thousand, and some months later found out the hard way that frozen beans have about a 3 month freezer life.

I made lots of compost that year.
You missed the point about storing French beans, I eat them fresh in two ways and store as dried haricot beans.