| for life | 27 | purpose |
| for development | 25 | purpose |
| for good health | 25 | purpose |
| iron → be → essential | 363 |
| iron → be → important | 148 |
| iron → be → vital | 88 |
| iron → be → critical | 58 |
| iron → be → crucial | 33 |
| iron → be → an essential | 5 |
| negative | neutral | positive |
| 0.096 | 0.555 | 0.349 |
| Raw frequency | 695 |
| Normalized frequency | 1.000 |
| Modifier score | 0.900 |
| Perplexity | 183.333 |