| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] which they could have | 10 |
|
| 2 | [prep] which they could have | 10 |
|
| 3 | in which they could have | 6 |
|
| 4 | in which they could have | 6 |
|
| 5 | which they could have [vb pp] | 8 |
|
| 6 | which they could have [verb] | 8 |
|
