| from one person | 10 | other |
| from fatigue | 6 | cause |
| from cold, short breath | 6 | other |
| symptom → can → range | 15 |
| symptom → can → vary | 11 |
| symptom → be → varied | 9 |
| symptom → vary in → severity | 4 |
| symptom → can → differ | 3 |
| negative | neutral | positive |
| 0.672 | 0.310 | 0.018 |
| Raw frequency | 42 |
| Normalized frequency | 0.735 |
| Modifier score | 1.000 |
| Perplexity | 56.660 |