| to the development of premature infants | 3 | purpose |
| to persuade prospective customers | 3 | purpose |
| touch → be → necessary | 13 |
| touch → be → required | 6 |
| negative | neutral | positive |
| 0.043 | 0.665 | 0.292 |
| Raw frequency | 19 |
| Normalized frequency | 0.479 |
| Modifier score | 0.450 |
| Perplexity | 180.110 |