| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [adv] a week | 184 |
|
| 2 | [adv] once a week | 122 |
|
| 3 | [noun sg] once a week | 110 |
|
| 4 | [noun sg] [adv] once a | 30 |
|
