| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] five years [unc] | 81 |
|
| 2 | five years [unc] time | 44 |
|
| 3 | [prep] five years time | 23 |
|
| 4 | [prep] years [unc] time | 5 |
|
