| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [conj] a [noun sg] | 4804 |
|
| 2 | [adv] once a [noun sg] | 336 |
|
| 3 | [conj] once a [noun sg] | 120 |
|
| 4 | [adv] [conj] once a | 38 |
|
