| with attached to a lung | 6 | other |
| in mammals | 3 | other |
| under normal circumstances | 2 | temporal |
| trachea → be → tube | 37 |
| trachea → be → the tube | 15 |
| trachea → be → rigid tube | 6 |
| trachea → be → wide tube | 3 |
| negative | neutral | positive |
| 0.135 | 0.808 | 0.057 |
| Raw frequency | 61 |
| Normalized frequency | 1.000 |
| Modifier score | 0.800 |
| Perplexity | 36.456 |