| from oxygen | 17 | cause |
| naturally | 10 | manner |
| by converting oxygen | 9 | manner |
| ozone → be → produced | 133 |
| ozone → be → created | 116 |
| ozone → be → generated | 56 |
| ozone → be → made | 13 |
| ozone → be → derived | 7 |
| negative | neutral | positive |
| 0.231 | 0.662 | 0.107 |
| Raw frequency | 325 |
| Normalized frequency | 1.000 |
| Modifier score | 0.308 |
| Perplexity | 257.832 |