| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [prep] three years ' | 6 |
|
| 2 | [noun pl] [prep] three years ['s] | 6 |
|
| 3 | [noun pl] [prep] three years ' | 6 |
|
| 4 | [noun pl] [prep] three years [unc] | 6 |
|
