| as relating to the human race | 13 | other |
| with research | 12 | other |
| with rational connections | 6 | other |
| historian → be → concerned | 49 |
| historian → be → more concerned | 7 |
| negative | neutral | positive |
| 0.219 | 0.712 | 0.069 |
| Raw frequency | 56 |
| Normalized frequency | 0.748 |
| Modifier score | 0.722 |
| Perplexity | 47.444 |