| for anyone | 20 | other |
| for new specialists | 15 | transitive-object |
| in most of the air forces | 15 | location |
| training → be → mandatory | 287 |
| training → become → mandatory | 13 |
| training → be made → mandatory | 12 |
| training → be → obligatory | 9 |
| training → be → mandatory requirement | 8 |
| negative | neutral | positive |
| 0.119 | 0.691 | 0.191 |
| Raw frequency | 329 |
| Normalized frequency | 0.686 |
| Modifier score | 0.591 |
| Perplexity | 142.594 |