| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a few years at | 6 |
|
| 2 | [prep] a few years at | 6 |
|
| 3 | for a [adj] years at | 6 |
|
| 4 | [prep] a [det] years at | 6 |
|
