| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used [prep] [adj] | 269 |
|
| 2 | not been [prep] [adj] | 83 |
|
| 3 | not used [prep] [adj] | 74 |
|
| 4 | not been used [prep] | 37 |
|
