| over bronze in warfare implements | 4 | other |
| to all other metal ions | 4 | other |
| to its predecessor | 2 | other |
| iron → be → superior | 5 |
| iron → have → distinct advantage | 4 |
| negative | neutral | positive |
| 0.023 | 0.487 | 0.490 |
| Raw frequency | 9 |
| Normalized frequency | 0.202 |
| Modifier score | 0.500 |
| Perplexity | 110.111 |