| to prevent invasion | 3 | purpose |
| for a dialogue | 3 | purpose |
| often | 2 | degree |
| point → be → necessary | 10 |
| point → be → need | 7 |
| point → be → required | 3 |
| negative | neutral | positive |
| 0.214 | 0.623 | 0.163 |
| Raw frequency | 20 |
| Normalized frequency | 0.364 |
| Modifier score | 0.600 |
| Perplexity | 195.439 |