| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [been] used for [adj] | 20 |
|
| 2 | [vb -s] [been] for the [adj] | 19 |
|
| 3 | [vb -s] [been] used for the | 14 |
|
| 4 | [been] used for the [adj] | 10 |
|
