| during most of earth history | 5 | temporal |
| during the archean | 2 | temporal |
| certainly | 2 | manner |
| ocean → be → anoxic | 8 |
| ocean → become → anoxic | 7 |
| negative | neutral | positive |
| 0.522 | 0.442 | 0.036 |
| Raw frequency | 15 |
| Normalized frequency | 0.317 |
| Modifier score | 0.500 |
| Perplexity | 386.139 |