| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what used | 87 |
|
| 2 | [prep] what used | 87 |
|
| 3 | of what used | 29 |
|
| 4 | in what used | 26 |
|
| 5 | to what used | 7 |
|
| 6 | on what used | 6 |
|
