| despite a secondary root canal procedure | 3 | other |
| sometimes | 2 | temporal |
| infection → can → recur | 5 |
| infection → can → reoccur | 4 |
| infection → could → recur | 3 |
| negative | neutral | positive |
| 0.529 | 0.388 | 0.083 |
| Raw frequency | 12 |
| Normalized frequency | 0.228 |
| Modifier score | 0.400 |
| Perplexity | 147.506 |