長期

1. Origins, structure, and basic meaning

• Structure: 長期(ちょうき) means an extended period.
• Basic usage: It describes the overall span of an undertaking such as a long trip or lengthy construction work.

2. Common pitfalls and similar expressions

• The perspective compared with 長時間
  • 長時間(ちょうじかん) tends to focus on time spent continuously in an activity, while 長期 often describes the overall period of a trip or plan. The distinction is not fixed by a particular number of hours or days.