| quite | 17 | degree |
| after an accident | 9 | temporal |
| among children | 9 | other |
| nightmare → be → common | 56 |
| nightmare → be → prevalent | 5 |
| nightmare → be → common problem | 3 |
| negative | neutral | positive |
| 0.597 | 0.363 | 0.040 |
| Raw frequency | 64 |
| Normalized frequency | 0.995 |
| Modifier score | 0.500 |
| Perplexity | 118.477 |