| severely | 119 | degree |
| badly | 79 | degree |
| from coffee | 31 | other |
| tooth → be → stained | 1336 |
| tooth → be stained on → the surface | 15 |
| tooth → be stained to → the point | 3 |
| tooth → be stained on → the interior | 3 |
| negative | neutral | positive |
| 0.431 | 0.418 | 0.151 |
| Raw frequency | 1357 |
| Normalized frequency | 0.792 |
| Modifier score | 0.558 |
| Perplexity | 158.207 |