| easily | 5 | manner |
| readily | 2 | manner |
| sometimes | 2 | temporal |
| virus → can → mutate | 23 |
| virus → be able to → mutate | 5 |
| virus → could → mutate | 4 |
| virus → be prone to → mutate | 3 |
| negative | neutral | positive |
| 0.665 | 0.294 | 0.040 |
| Raw frequency | 35 |
| Normalized frequency | 0.594 |
| Modifier score | 0.700 |
| Perplexity | 26.956 |