午後

1. Origins, structure, and basic meaning

• Structure: 午後, read ごご, means the afternoon, the part of the day after noon and before evening.
• Basic usage: It can mark when study begins at a library or the time by which rain has already stopped.

2. Common pitfalls and similar expressions

• The part of the day after noon
  • It marks the afternoon when study begins or the point by which rain has stopped. The surrounding construction shows whether it is a starting time or a deadline-like reference point.