How do I tell which command has the longest manual on my system? code example

Example: How do I tell which command has the longest manual on my system?

$ find /usr/share/man/ -type f -exec ls -S {} + 2>/dev/null | head | while \
  read -r file; do printf "%-40s" "$file"; \
  man "$file" 2>/dev/null | wc -lwm; done | sort -nrk 4