| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | case | Western countries | Carrying a briefcase or laptop case is common in professional settings. | 1 |
| 2 | cold case | Western countries | Refers to an unsolved criminal case that has gone inactive for an extended period, typically involving a serious crime like murder or abduction. | 1 |
| 3 | cold case | Western countries | Refers to an unsolved criminal case that has gone unsolved for an extended period of time, often years or even decades. | 1 |
| 4 | key case | Western countries | A key case is often a small, functional accessory used to organize and protect keys, often made of leather or durable materials. | 1 |