| for fountain pens | 10 | purpose |
| perfectly | 8 | degree |
| compared to the printing inks | 7 | other |
| ink → be → safe | 77 |
| ink → be safe to → use | 9 |
| negative | neutral | positive |
| 0.120 | 0.402 | 0.478 |
| Raw frequency | 86 |
| Normalized frequency | 0.703 |
| Modifier score | 1.000 |
| Perplexity | 356.486 |