| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | phosgene | Eastern countries | Phosgene is not commonly known in everyday life and is associated with chemical safety and industrial regulations. | 1 |
| 2 | phosgene | Eastern countries | Less commonly known and not a prominent historical reference | 1 |
| 3 | phosphine | Eastern countries | Phosphine is known as a toxic gas used in agricultural fumigation and pest control. | 1 |
| 4 | phosphine | Eastern countries | Phosphine is commonly associated with semiconductor manufacturing and research in phosphor materials for lighting. | 1 |