| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at an open | 14 |
|
| 2 | [v-ing] at an open | 9 |
|
| 3 | [noun] at an open | 9 |
|
| 4 | [noun sg] at an open | 6 |
|
| 5 | at an open [noun sg] | 32 |
|
| 6 | at an open [noun] | 32 |
|
| 7 | at an open meeting | 7 |
|
| 8 | at an open meeting | 7 |
|
