| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] off by | 41 |
|
| 2 | had been [verb] off by | 17 |
|
| 3 | have been spark off by | 8 |
|
| 4 | have been sparked off by | 8 |
|
| 5 | have been [verb] off by | 7 |
|
| 6 | have been [verb] off by | 6 |
|
| 7 | to have been [verb] off by | 5 |
|
