| often | 10 | temporal |
| for more than a week | 9 | temporal |
| as a symptom | 7 | manner |
| child → have → cough | 180 |
| child → develop → cough | 45 |
| child → have → persistent cough | 20 |
| child → experience → cough | 12 |
| child → have → prolonged cough | 5 |
| negative | neutral | positive |
| 0.611 | 0.331 | 0.058 |
| Raw frequency | 262 |
| Normalized frequency | 0.538 |
| Modifier score | 0.712 |
| Perplexity | 65.085 |