| very | 16 | degree |
| especially | 9 | degree |
| to long-term plaque exposure | 8 | cause |
| tooth → be → fragile | 94 |
| tooth → be in → fragile state | 3 |
| negative | neutral | positive |
| 0.582 | 0.349 | 0.068 |
| Raw frequency | 97 |
| Normalized frequency | 0.450 |
| Modifier score | 0.740 |
| Perplexity | 421.293 |