| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | survey carried out [prep] the | 41 |
|
| 2 | survey carried out [prep] the | 32 |
|
| 3 | survey carried out by the | 31 |
|
| 4 | survey carried out by the | 31 |
|
| 5 | surveys carried out [prep] the | 9 |
|
| 6 | survey carried out in the | 6 |
|
| 7 | survey carried out in the | 6 |
|
