| naturally | 16 | manner |
| in the lower level of stratosphere | 7 | location |
| in the atmosphere | 5 | location |
| ozone → be → gas | 130 |
| ozone → contain → gas | 16 |
| ozone → be → occurring gas | 15 |
| ozone → be applied as → gas | 6 |
| ozone → be → the gas | 3 |
| negative | neutral | positive |
| 0.226 | 0.647 | 0.127 |
| Raw frequency | 170 |
| Normalized frequency | 0.862 |
| Modifier score | 0.500 |
| Perplexity | 65.785 |