| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] on | 1091 |
|
| 2 | had been [verb] a | 570 |
|
| 3 | been [verb] on a | 338 |
|
| 4 | had [verb] on a | 216 |
|
| 5 | had been on a | 36 |
|
