| from dead plant material | 4 | cause |
| essentially | 2 | degree |
| from rotting vegetation | 2 | cause |
| peat → be → formed | 12 |
| peat → be formed in → marsh | 3 |
| negative | neutral | positive |
| 0.156 | 0.774 | 0.070 |
| Raw frequency | 15 |
| Normalized frequency | 0.621 |
| Modifier score | 0.900 |
| Perplexity | 291.658 |