| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been a | 173 |
|
| 2 | who have been a | 152 |
|
| 3 | who had been a | 118 |
|
| 4 | who has been a | 37 |
|
| 5 | who have been an | 21 |
|
| 6 | who 's been a | 8 |
|
| 7 | who have been a | 5 |
|
| 8 | who 'd been a | 5 |
|
