| frequently | 10 | temporal |
| constantly | 9 | temporal |
| regularly | 4 | degree |
| textbook → be → updated | 40 |
| textbook → be → revised | 24 |
| textbook → be revised over → year | 6 |
| negative | neutral | positive |
| 0.111 | 0.591 | 0.298 |
| Raw frequency | 70 |
| Normalized frequency | 0.660 |
| Modifier score | 0.800 |
| Perplexity | 490.827 |