| slightly | 10 | degree |
| over time | 9 | temporal |
| in colour | 5 | other |
| leather → be → darker | 14 |
| leather → get → darker | 11 |
| leather → become → darker | 11 |
| leather → look → darker | 5 |
| leather → develop → darker sheen | 3 |
| negative | neutral | positive |
| 0.194 | 0.564 | 0.242 |
| Raw frequency | 44 |
| Normalized frequency | 0.347 |
| Modifier score | 0.400 |
| Perplexity | 477.261 |