| very | 15 | degree |
| in preventing fatal injuries | 8 | purpose |
| no longer | 5 | temporal |
| helmet → be → effective | 101 |
| helmet → be → most effective | 8 |
| helmet → be → efficient | 7 |
| negative | neutral | positive |
| 0.166 | 0.457 | 0.377 |
| Raw frequency | 116 |
| Normalized frequency | 0.713 |
| Modifier score | 0.475 |
| Perplexity | 48.410 |