| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] on [num] [noun pl] | 18 |
|
| 2 | [was/were] performed on [num] | 16 |
|
| 3 | performed on [num] [noun pl] | 9 |
|
| 4 | [was/were] performed on [noun pl] | 5 |
|
