| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [art] [noun] | 1611 |
|
| 2 | at [adv] [art] [noun] | 1554 |
|
| 3 | [prep] once [art] [noun] | 185 |
|
| 4 | at once [art] [noun] | 113 |
|
| 5 | at once [art] [noun] | 113 |
|
