| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] they | 7365 |
|
| 2 | [prep] [Wh det] used | 87 |
|
| 3 | [Wh det] they used | 87 |
|
| 4 | [prep] they used | 17 |
|
