| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] a few days | 18 |
|
| 2 | [vb past] [prep] a few day | 18 |
|
| 3 | [vb past] within a few day | 7 |
|
| 4 | [vb past] for a few day | 5 |
|
