| in color | 24 | other |
| often | 8 | degree |
| due to natural pigmentation | 5 | cause |
| tooth → be → gray | 66 |
| tooth → turn → gray | 34 |
| tooth → look → gray | 28 |
| tooth → appear → gray | 25 |
| tooth → become → gray | 13 |
| tooth → have → gray | 11 |
| tooth → turned → gray | 4 |
| tooth → start to turn → gray | 3 |
| negative | neutral | positive |
| 0.484 | 0.469 | 0.047 |
| Raw frequency | 184 |
| Normalized frequency | 0.533 |
| Modifier score | 0.558 |
| Perplexity | 366.523 |