| originally | 19 | manner |
| currently | 16 | temporal |
| specifically | 13 | manner |
| drug → be → developed | 831 |
| drug → be developed in → recent years | 6 |
| drug → be developed → available | 5 |
| negative | neutral | positive |
| 0.195 | 0.588 | 0.217 |
| Raw frequency | 842 |
| Normalized frequency | 0.751 |
| Modifier score | 0.591 |
| Perplexity | 67.760 |