| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a few years [prep] | 80 |
|
| 2 | [prep] a few [prep] [art] | 61 |
|
| 3 | a few years [prep] [art] | 49 |
|
| 4 | [prep] a few years [art] | 31 |
|
