| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] at a [noun] | 1714 |
|
| 2 | [noun pl] at a [noun sg] | 1601 |
|
| 3 | [noun] at a conference | 58 |
|
| 4 | [noun pl] at [art] conference | 54 |
|
| 5 | [noun pl] [prep] a conference | 31 |
|
| 6 | [noun pl] [prep] a conference | 31 |
|
| 7 | [noun pl] at a conference | 18 |
|
| 8 | [noun pl] at a conference | 18 |
|
