| with headaches | 5 | other |
| early on | 5 | temporal |
| often | 4 | temporal |
| symptom → be similar to → the flu | 13 |
| symptom → be similar to → flu | 11 |
| symptom → resemble → the flu | 11 |
| symptom → mimic → the flu | 9 |
| symptom → resemble → those of the flu | 3 |
| negative | neutral | positive |
| 0.708 | 0.266 | 0.025 |
| Raw frequency | 47 |
| Normalized frequency | 0.463 |
| Modifier score | 0.600 |
| Perplexity | 8.455 |