| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after [adv] a week | 17 |
|
| 2 | than [adv] a week | 15 |
|
| 3 | [subord] about a week | 14 |
|
| 4 | [subord] once a week | 10 |
|
| 5 | [subord] twice a week | 6 |
|
