| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] [prep] a | 129 |
|
| 2 | a [adv] [prep] a | 129 |
|
| 3 | [art] once [prep] a | 20 |
|
| 4 | a once [prep] [art] | 11 |
|
| 5 | a once [prep] a | 11 |
|
| 6 | a once [prep] a | 11 |
|
