| very | 7 | degree |
| in the treatment of erectile dysfunction | 6 | transitive-object |
| in males | 5 | other |
| viagra → be → effective | 24 |
| viagra → do → what good | 4 |
| viagra → be → efficient treatment | 3 |
| viagra → be → effective treatment | 3 |
| negative | neutral | positive |
| 0.154 | 0.502 | 0.344 |
| Raw frequency | 34 |
| Normalized frequency | 0.645 |
| Modifier score | 0.500 |
| Perplexity | 154.903 |