| naturally | 6 | manner |
| through the nitrogen cycle | 6 | temporal |
| via dissolved minerals | 5 | other |
| nitrate → be found in → water | 13 |
| nitrate → be → water | 7 |
| nitrate → occur in → water | 5 |
| nitrate → come into → water supplies | 4 |
| nitrate → be found in → water supplies | 4 |
| nitrate → enter → water | 3 |
| negative | neutral | positive |
| 0.308 | 0.591 | 0.101 |
| Raw frequency | 36 |
| Normalized frequency | 0.652 |
| Modifier score | 0.800 |
| Perplexity | 18.026 |