| since the early days of colonization | 5 | temporal |
| frequently | 4 | temporal |
| in north america | 2 | location |
| slate → be used for → roofing | 25 |
| slate → be used in → roofing | 7 |
| slate → be used on → roof | 5 |
| slate → be made into → roofing slates | 5 |
| slate → be used for → roof | 4 |
| slate → be used for → roofing shingles | 3 |
| slate → be used for → roof tiles | 3 |
| negative | neutral | positive |
| 0.076 | 0.746 | 0.178 |
| Raw frequency | 52 |
| Normalized frequency | 0.702 |
| Modifier score | 0.838 |
| Perplexity | 160.952 |