| by traumatic life events | 4 | cause |
| during migraine headaches | 2 | temporal |
| brain → be → triggered | 25 |
| brain → gets → triggered | 4 |
| negative | neutral | positive |
| 0.400 | 0.508 | 0.092 |
| Raw frequency | 29 |
| Normalized frequency | 0.364 |
| Modifier score | 0.800 |
| Perplexity | 411.063 |