| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [subord] once [prep] a [noun] | 7 |
|
| 2 | more [subord] once [prep] a [noun] | 7 |
|
| 3 | more [subord] once [prep] a [noun] | 7 |
|
| 4 | [adv] [subord] once [prep] a [noun] | 7 |
|
