| to ensure | 13 | purpose |
| in situations | 7 | location |
| like a captain on a ship | 3 | other |
| teacher → have → duty | 72 |
| teacher → have → the duty | 29 |
| teacher → perform → duty | 16 |
| teacher → be → duty | 4 |
| teacher → do → duty | 4 |
| teacher → undertake → duty | 3 |
| negative | neutral | positive |
| 0.223 | 0.610 | 0.167 |
| Raw frequency | 128 |
| Normalized frequency | 0.544 |
| Modifier score | 0.930 |
| Perplexity | 48.329 |