How long does it take to write an edit?

Question

1C

Good afternoon!
Guys, tell me how much time it takes to write processing?
Literally: "Writing processing for the difference in settlements from version 2.2. to version 2.4."?
I ask the question because one specialist is ready to do it in 16 hours, and the other swears and beats his chest talking about 4 hours for everything with two smoke breaks. Orient please, the big difference in hours is painfully embarrassing.
Thank you!