| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who has [not/n't] been | 81 |
|
| 2 | who has [not/n't] [been] | 81 |
|
| 3 | who has not [been] | 58 |
|
| 4 | who has n't [been] | 23 |
|
