| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] happened to be [verb] | 14 |
|
| 2 | [adv] happened to be [verb] | 14 |
|
| 3 | just happened to be [verb] | 11 |
|
| 4 | [adv] happened to be [v-ing] | 9 |
|
