| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at a | 973 |
|
| 2 | [that] [vb past] a | 681 |
|
| 3 | [that] [vb past] at | 219 |
|
| 4 | [that] at a | 68 |
|
