| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [adv] a | 192 |
|
| 2 | [prep] [adv] a week | 184 |
|
| 3 | [pron] [adv] a week | 54 |
|
| 4 | [prep] [pron] a week | 14 |
|
