| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] on several [noun pl] | 12 |
|
| 2 | has been [verb] on several [noun] | 12 |
|
| 3 | has been [vb pp] on several [noun] | 12 |
|
| 4 | has been [verb] on several occasion | 6 |
|
| 5 | has been [verb] on several occasions | 6 |
|
