| for a year | 3 | temporal |
| at −80°c | 3 | location |
| within 24 hours | 3 | temporal |
| plasma → be → frozen | 29 |
| plasma → be stored → frozen | 4 |
| plasma → be kept → frozen | 3 |
| negative | neutral | positive |
| 0.126 | 0.823 | 0.051 |
| Raw frequency | 36 |
| Normalized frequency | 0.631 |
| Modifier score | 0.500 |
| Perplexity | 99.916 |