What is the most and least hiked section of the AT

[modiyooch]

The only section that I have done more than once on the AT is Roan Mt to Carvers Gap or vice versa. Simply because I live close and visit Roan Mt alot.

The section that I will not do again (which isn't what you asked) is Katahdin. That hike terrified me.

[ki0eh]

...that would be the least-travelled areas.

Out of curiosity, how is this measured or estimated?