| because of safety issues | 7 | cause |
| almost always | 4 | degree |
| by decomposing freon | 2 | other |
| phosgene → be → produced | 11 |
| phosgene → be → formed | 4 |
| negative | neutral | positive |
| 0.413 | 0.554 | 0.033 |
| Raw frequency | 15 |
| Normalized frequency | 1.000 |
| Modifier score | 0.600 |
| Perplexity | 38.866 |