| for many sufferers | 25 | transitive-object |
| often | 12 | temporal |
| suddenly | 6 | manner |
| flu → cause → headache | 59 |
| flu → bring → headache | 25 |
| flu → include → headache | 18 |
| flu → be characterized by → headache | 7 |
| flu → be accompanied by → headache | 7 |
| flu → come on → headache | 6 |
| flu → have → headache | 5 |
| flu → come with → headache | 5 |
| flu → present with → headache | 4 |
| flu → be characterised by → headache | 4 |
| flu → be → headache | 3 |
| negative | neutral | positive |
| 0.871 | 0.119 | 0.010 |
| Raw frequency | 143 |
| Normalized frequency | 0.819 |
| Modifier score | 0.653 |
| Perplexity | 264.756 |