| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] two years [unc] | 122 |
|
| 2 | two years [unc] time | 39 |
|
| 3 | [prep] two years time | 21 |
|
| 4 | [prep] years [unc] time | 5 |
|
