| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] three years | 284 |
|
| 2 | [prep] three years [unc] | 102 |
|
| 3 | [verb] three years [unc] | 17 |
|
| 4 | [verb] [prep] three [unc] | 14 |
|
