延べ

1. Origins, structure, and basic meaning

• Structure: Written 延べ and read のべ, it means a cumulative total that counts repeated participation across days or occasions.
• Basic usage: It is used for person-days over a project or total course attendances.

2. Common pitfalls and similar expressions

• Not a count of unique people
  • One person may be counted multiple times, so the total can exceed distinct participants.