| farther | 5 | location |
| further | 2 | manner |
| in the 1840s | 2 | temporal |
| pioneer → head → west | 16 |
| pioneer → move → west | 5 |
| pioneer → go → west | 3 |
| pioneer → push → west | 3 |
| negative | neutral | positive |
| 0.093 | 0.775 | 0.132 |
| Raw frequency | 27 |
| Normalized frequency | 0.941 |
| Modifier score | 0.700 |
| Perplexity | 282.032 |