| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [adv] a [noun sg] | 3781 |
|
| 2 | once [conj] [adv] a | 110 |
|
| 3 | once [adv] a [noun sg] | 34 |
|
| 4 | once [conj] a [noun sg] | 15 |
|
| 5 | once [conj] [adv] [noun sg] | 5 |
|
