| rarely | 13 | degree |
| naturally | 10 | manner |
| as the result of human activities | 5 | cause |
| lead → be found in → water | 39 |
| lead → be present in → water | 12 |
| lead → be found in → source water | 7 |
| lead → be found in → the water | 6 |
| lead → occur in → water | 5 |
| lead → be present in → the water | 3 |
| negative | neutral | positive |
| 0.555 | 0.415 | 0.030 |
| Raw frequency | 72 |
| Normalized frequency | 0.477 |
| Modifier score | 0.162 |
| Perplexity | 48.961 |