as anticonvulsants in the united states | 6 | location |
during the late 1990s | 2 | temporal |
originally | 2 | manner |
agent → be → approved | 18 |
agent → be approved for → use | 10 |
negative | neutral | positive |
0.178 | 0.562 | 0.260 |
Raw frequency | 28 |
Normalized frequency | 0.367 |
Modifier score | 0.600 |
Perplexity | 402.007 |