| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has not been [vb pp] for | 38 |
|
| 2 | has n't been [vb pp] for | 19 |
|
| 3 | has [not/n't] been used for | 6 |
|
| 4 | has [not/n't] been seen for | 5 |
|
