| completely | 2 | degree |
| to such an environment | 2 | other |
| for long-term use | 2 | purpose |
| catalyst → be → unstable | 12 |
| catalyst → be not → stable | 4 |
| negative | neutral | positive |
| 0.646 | 0.331 | 0.023 |
| Raw frequency | 16 |
| Normalized frequency | 0.391 |
| Modifier score | 0.900 |
| Perplexity | 95.340 |