| naturally | 3 | manner |
| in the water | 3 | location |
| fluoride → be found in → air | 7 |
| fluoride → occur in → the air | 3 |
| fluoride → be found in → the air | 3 |
| negative | neutral | positive |
| 0.121 | 0.775 | 0.104 |
| Raw frequency | 13 |
| Normalized frequency | 0.293 |
| Modifier score | 0.500 |
| Perplexity | 47.425 |