| in properly maintained and operated systems | 8 | other |
| very | 7 | degree |
| completely | 4 | degree |
| propane → be → safe | 52 |
| propane → be safe to → use | 3 |
| negative | neutral | positive |
| 0.071 | 0.270 | 0.659 |
| Raw frequency | 55 |
| Normalized frequency | 0.832 |
| Modifier score | 0.500 |
| Perplexity | 75.231 |