| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | tunnel construction | South Korea | Tunnel construction is crucial for creating efficient transportation networks in mountainous and rugged terrains. | 1 |
| 2 | tunnels | South Korea | Tunnels are used for efficient transportation, but there is also a focus on architectural design and aesthetics in tunnel construction. | 1 |