| at the surface | 10 | location |
| for white-water rafting | 4 | purpose |
| often | 3 | temporal |
| river → have → rapid | 39 |
| river → be → rapid | 38 |
| river → offer → rapid | 5 |
| river → become → rapid | 4 |
| river → be full of → rapid | 4 |
| negative | neutral | positive |
| 0.118 | 0.604 | 0.278 |
| Raw frequency | 90 |
| Normalized frequency | 0.590 |
| Modifier score | 0.600 |
| Perplexity | 192.630 |