| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] at [adv] [art] | 32 |
|
| 2 | [det] at [adv] [art] | 32 |
|
| 3 | [det] [prep] once [art] | 29 |
|
| 4 | [det] at once [art] | 28 |
|
| 5 | [adj] at once [art] | 28 |
|
