| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which could [adv] | 475 |
|
| 2 | [vb pp] which [adv] | 59 |
|
| 3 | [vb pp] which could | 44 |
|
| 4 | [vb pp] could [adv] | 37 |
|
