| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] three years [unc] time | 12 |
|
| 2 | [prep] three years ' time | 12 |
|
| 3 | [prep] three years ' time | 12 |
|
| 4 | [prep] three years ['s] time | 12 |
|
