| to a variety of populations | 4 | transitive-object |
| during this period | 3 | temporal |
| occupationally | 2 | manner |
| nurse → be → exposed | 21 |
| nurse → have → exposure | 3 |
| negative | neutral | positive |
| 0.536 | 0.399 | 0.065 |
| Raw frequency | 24 |
| Normalized frequency | 0.382 |
| Modifier score | 0.500 |
| Perplexity | 376.562 |