| for a period of time | 4 | temporal |
| naturally | 3 | manner |
| without adequate oxygen | 2 | other |
| pool → be → stagnant | 16 |
| pool → become → stagnant | 7 |
| negative | neutral | positive |
| 0.631 | 0.332 | 0.037 |
| Raw frequency | 23 |
| Normalized frequency | 0.298 |
| Modifier score | 0.300 |
| Perplexity | 335.155 |