調査

1. Origins, structure, and basic meaning

• Structure: 調査(ちょうさ) is examining something to establish facts or actual conditions.
• Basic usage: It covers both investigating a site and gathering information through a survey.

2. Common pitfalls and similar expressions

• The two example uses
  • In 安全性を調査している, the safety investigation is ongoing.
  • アンケート調査の結果 refers to the findings of a questionnaire survey.