| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a few week | 460 |
|
| 2 | [prep] a week [unc] | 124 |
|
| 3 | a few week [unc] | 33 |
|
| 4 | [prep] a few [unc] | 13 |
|
