| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] used [prep] a [adj] | 14 |
|
| 2 | has been used [prep] a [adj] | 14 |
|
| 3 | has [been] used as a [adj] | 9 |
|
| 4 | has [been] used as a [adj] | 9 |
|
