| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [adv] a [noun sg] | 5044 |
|
| 2 | [conj] [adv] a [noun sg] | 4241 |
|
| 3 | [conj] once [art] [noun sg] | 210 |
|
| 4 | [conj] once a [noun] | 122 |
|
| 5 | [conj] once a [noun sg] | 120 |
|
