| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | hollow | African | Hollow trees or logs are often used as natural drums or musical instruments in traditional ceremonies and rituals. | 1 |
| 2 | hollow | African countries | Hollow gourds used as musical instruments for traditional music | 1 |
| 3 | hollow bones | African cultures | Used in traditional medicine and healing practices for their perceived mystical properties | 1 |