| before surgery | 3 | temporal |
| for probable respiratory training | 2 | purpose |
| the most | 2 | manner |
| patient → need → therapy | 9 |
| patient → require → therapy | 3 |
| negative | neutral | positive |
| 0.195 | 0.688 | 0.117 |
| Raw frequency | 12 |
| Normalized frequency | 0.378 |
| Modifier score | 0.900 |
| Perplexity | 159.623 |