| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] once a week | 122 |
|
| 2 | [adv] [conj] once a | 38 |
|
| 3 | [adv] [conj] a week | 36 |
|
| 4 | [conj] once a week | 25 |
|
