| very | 18 | degree |
| especially | 13 | degree |
| for two or more times | 6 | temporal |
| asthma → be → severe | 166 |
| asthma → be → severe condition | 4 |
| asthma → be considered → severe | 4 |
| negative | neutral | positive |
| 0.567 | 0.379 | 0.054 |
| Raw frequency | 174 |
| Normalized frequency | 0.778 |
| Modifier score | 0.567 |
| Perplexity | 208.716 |