| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [be] used for | 280 |
|
| 2 | had [adv] [be] for | 202 |
|
| 3 | had [adv] [be] used | 75 |
|
| 4 | had [be] used for | 36 |
|
