| previously | 36 | temporal |
| primer → be → described | 46 |
| primer → be described in → materials | 3 |
| primer → be described in → the literature | 3 |
| negative | neutral | positive |
| 0.046 | 0.876 | 0.078 |
| Raw frequency | 52 |
| Normalized frequency | 0.583 |
| Modifier score | 0.980 |
| Perplexity | 315.928 |