| very | 6 | degree |
| to ensure lens performance | 4 | purpose |
| as a navy seal | 4 | other |
| lens → be → hard | 31 |
| lens → be → tough | 30 |
| lens → be hard to → beat | 4 |
| negative | neutral | positive |
| 0.258 | 0.337 | 0.406 |
| Raw frequency | 65 |
| Normalized frequency | 0.494 |
| Modifier score | 0.500 |
| Perplexity | 321.540 |