| for the optical material | 7 | cause |
| particularly | 5 | degree |
| for implantation | 4 | purpose |
| property → be → desirable | 13 |
| property → be → suitable | 8 |
| negative | neutral | positive |
| 0.056 | 0.355 | 0.589 |
| Raw frequency | 21 |
| Normalized frequency | 1.000 |
| Modifier score | 0.600 |
| Perplexity | 260.335 |