| Typicality: | 0.436 |
| Saliency: | 0.526 |
| usually | 33 | temporal |
| gradually | 29 | manner |
| over time | 10 | temporal |
| symptom → develop over → time | 130 |
| symptom → evolve over → time | 12 |
| symptom → be → develop over time | 3 |
| symptom → migrate over → time | 3 |
| negative | neutral | positive |
| 0.505 | 0.462 | 0.033 |
| Raw frequency | 148 |
| Normalized frequency | 0.526 |
| Modifier score | 0.650 |
| Perplexity | 22.598 |