| sometimes | 11 | temporal |
| to intensify their hue | 4 | purpose |
| routinely | 3 | temporal |
| amethyst → be → heated | 19 |
| amethyst → be → heat | 10 |
| amethyst → be treated with → heat | 5 |
| amethyst → be formed under → heat | 4 |
| amethyst → be exposed to → heat | 3 |
| negative | neutral | positive |
| 0.037 | 0.762 | 0.201 |
| Raw frequency | 41 |
| Normalized frequency | 0.595 |
| Modifier score | 0.578 |
| Perplexity | 334.890 |