Fewer / Less
UsageUse fewer for countable items and less for amounts. Established expressions involving time, money, distance and measurements often use less.
Fewer
Use when
You are referring to a number of separate things that can be counted.
Example
“The revised process requires fewer approvals.”
Less
Use when
You are referring to an amount, extent or degree.
Example
“The revised process requires less time.”
Quick check
less approvals, less requirements
Usage note
This is a useful clarity distinction, not an absolute ban: phrases such as “less than five years” are standard.