| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | conference [was/were] held [prep] | 51 |
|
| 2 | conference [was/were] held [prep] | 47 |
|
| 3 | conference was held [prep] | 47 |
|
| 4 | conference [was/were] held in | 30 |
|
| 5 | conference [was/were] held in | 30 |
|
| 6 | conference [was/were] held at | 7 |
|
| 7 | conference [was/were] held at | 7 |
|
| 8 | conference [was/were] held on | 5 |
|
| 9 | conference [was/were] held on | 5 |
|
