| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used [prep] a [adj] | 706 |
|
| 2 | been [prep] a [adj] | 341 |
|
| 3 | been used [prep] [adj] | 269 |
|
| 4 | been used [prep] a | 172 |
|
