| to allow for drainage | 8 | purpose |
| to heal on own | 6 | purpose |
| often | 3 | temporal |
| incision → be left → open | 22 |
| incision → leave → open | 4 |
| negative | neutral | positive |
| 0.132 | 0.741 | 0.127 |
| Raw frequency | 26 |
| Normalized frequency | 0.354 |
| Modifier score | 0.800 |
| Perplexity | 57.920 |