| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [adv] a | 5966 |
|
| 2 | [noun] [adv] a | 3083 |
|
| 3 | [noun] once [art] | 425 |
|
| 4 | [noun] once a | 311 |
|
