| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [adv] used for | 11 |
|
| 2 | have [been] [adv] used for | 10 |
|
| 3 | [vb -s] [been] [adv] used for | 6 |
|
| 4 | has [been] [adv] used for | 6 |
|
