| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who had been working [prep] [art] | 9 |
|
| 2 | who had been working [prep] [art] | 9 |
|
| 3 | who had been working [prep] the | 8 |
|
| 4 | who had been working [prep] the | 8 |
|
