能率

1. Origins, structure, and basic meaning

• Structure: The work-performance noun 能率 (のうりつ) denotes efficiency relative to the time and effort spent.
• Basic usage: A better arrangement may make 能率が上がる, while working without rest need not improve it.

2. Common pitfalls and similar expressions

• Efficiency of work
  • It concerns output relative to time and effort, not speed alone.