| for long-term storage | 4 | purpose |
| for at least 10,000 years | 4 | temporal |
| in this glass form | 4 | other |
| waste → be → safe | 25 |
| waste → be kept → safe | 4 |
| waste → be made → safe | 3 |
| negative | neutral | positive |
| 0.266 | 0.520 | 0.213 |
| Raw frequency | 32 |
| Normalized frequency | 0.405 |
| Modifier score | 0.950 |
| Perplexity | 314.087 |