| extremely | 15 | degree |
| in people | 6 | location |
| in its septicaemic and pneumonic forms | 2 | other |
| plague → be → severe | 23 |
| plague → be → severe disease | 7 |
| negative | neutral | positive |
| 0.802 | 0.180 | 0.018 |
| Raw frequency | 30 |
| Normalized frequency | 0.621 |
| Modifier score | 0.900 |
| Perplexity | 333.744 |