| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] on several [noun pl] | 22 |
|
| 2 | been [vb pp] on several [noun] | 22 |
|
| 3 | been [verb] on several occasion | 15 |
|
| 4 | been [verb] on several occasions | 15 |
|
