| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | rub | United States | Rubbing a genie's lamp is believed to grant wishes in folklore and popular culture. | 1 |
| 2 | rubies | United States | Rubies are highly valued gemstones and are often used in luxury jewelry and accessories. | 1 |
| 3 | rubric | United States | Used in education to outline grading criteria and expectations for assignments | 1 |
| 4 | rubric | United States | Used in education to provide clear criteria for grading and assessing student work. | 1 |