| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | desert oasis | Sub-Saharan Africa | Considered as vital gathering points for nomadic tribes and communities in the desert | 1 |
| 2 | oasis | Saharan countries | Oases are vital sources of water and vegetation in the arid deserts, providing sustenance and relief from the harsh conditions. | 1 |
| 3 | oasis | Saharan countries | A vital source of water and vegetation, considered a precious natural resource | 1 |