| in the united states | 16 | location |
| extremely | 8 | degree |
| due to vaccination programmes | 7 | cause |
| tetanus → be → rare | 32 |
| tetanus → be → rare disease | 6 |
| tetanus → be → rare but often fatal disease | 4 |
| tetanus → be → serious but rare infection | 3 |
| negative | neutral | positive |
| 0.438 | 0.433 | 0.129 |
| Raw frequency | 45 |
| Normalized frequency | 1.000 |
| Modifier score | 0.500 |
| Perplexity | 60.247 |