| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] at [art] time | 65 |
|
| 2 | been [vb pp] at the time | 60 |
|
| 3 | been effected at [art] time | 5 |
|
| 4 | been [vb pp] at a time | 5 |
|
