| to show up | 13 | purpose |
| sometimes | 6 | temporal |
| to appear after the infection | 6 | temporal |
| symptom → take → year | 64 |
| symptom → take up to → year | 3 |
| negative | neutral | positive |
| 0.635 | 0.335 | 0.030 |
| Raw frequency | 67 |
| Normalized frequency | 0.419 |
| Modifier score | 0.518 |
| Perplexity | 87.148 |