| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb -s] [adv] been [vb pp] for | 6 |
|
| 2 | which [vb -s] [adv] been [verb] for | 6 |
|
| 3 | which has [adv] been [verb] for | 6 |
|
