| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [be] used for | 100 |
|
| 2 | had [be] used for | 36 |
|
| 3 | [conj] had [be] used | 28 |
|
| 4 | [conj] had [be] for | 12 |
|
