| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had happened [prep] [art] | 169 |
|
| 2 | had [prep] [art] [num] | 29 |
|
| 3 | happened [prep] [art] [num] | 15 |
|
| 4 | had happened [prep] [num] | 10 |
|
