| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] often been [vb pp] for | 15 |
|
| 2 | have often been [vb pp] for | 15 |
|
| 3 | have often been [vb pp] for | 7 |
|
| 4 | has often been [vb pp] for | 7 |
|
| 5 | [vb -s] often been [vb pp] for | 7 |
|
| 6 | [vb base] often been [vb pp] for | 7 |
|
