| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be performed at the [adj] [noun] | 10 |
|
| 2 | be performed at the [adj] [noun sg] | 9 |
|
| 3 | be performed at the [adj] time | 7 |
|
| 4 | be performed at the [adj] time | 7 |
|
