| to drinking water | 12 | transitive-object |
| next | 5 | temporal |
| every other day or so | 5 | temporal |
| chlorine → be → added | 130 |
| chlorine → be → introduced | 3 |
| chlorine → be added to → the system | 3 |
| negative | neutral | positive |
| 0.378 | 0.548 | 0.074 |
| Raw frequency | 136 |
| Normalized frequency | 0.923 |
| Modifier score | 0.700 |
| Perplexity | 58.121 |