| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a year [unc] time | 46 |
|
| 2 | [prep] a few year [unc] | 29 |
|
| 3 | a few year [unc] time | 23 |
|
| 4 | [prep] a few year time | 20 |
|
