| usually | 4 | temporal |
| to help avoid infection | 4 | purpose |
| for 3 hours | 4 | temporal |
| wound → be kept → open | 13 |
| wound → be → maintained | 5 |
| wound → be → kept | 5 |
| negative | neutral | positive |
| 0.244 | 0.622 | 0.133 |
| Raw frequency | 23 |
| Normalized frequency | 0.391 |
| Modifier score | 0.725 |
| Perplexity | 128.668 |