| Typicality: | 0.285 |
| Saliency: | 0.286 |
| widely | 4 | degree |
| very | 3 | degree |
| to guide placement of epidurals | 3 | purpose |
| ultrasound → become → popular | 7 |
| ultrasound → become → available | 4 |
| negative | neutral | positive |
| 0.026 | 0.448 | 0.526 |
| Raw frequency | 11 |
| Normalized frequency | 0.286 |
| Modifier score | 0.500 |
| Perplexity | 23.509 |