| for maximizing the surface area | 5 | purpose |
| custom | 3 | degree |
| from cast iron | 3 | other |
| radiator → be → built | 20 |
| radiator → be → designed | 9 |
| radiator → be → constructed | 7 |
| negative | neutral | positive |
| 0.058 | 0.623 | 0.319 |
| Raw frequency | 36 |
| Normalized frequency | 0.416 |
| Modifier score | 0.833 |
| Perplexity | 212.481 |