| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [been] used | 674 |
|
| 2 | [been] used for | 248 |
|
| 3 | [vb -s] [been] for | 163 |
|
| 4 | [vb -s] used for | 11 |
|
