| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] three years | 138 |
|
| 2 | [prep] [art] three years | 138 |
|
| 3 | [prep] the three years | 137 |
|
| 4 | [prep] the three years | 137 |
|
| 5 | in [art] three years | 55 |
|
| 6 | over [art] three years | 22 |
|
| 7 | during [art] three years | 16 |
|
| 8 | of [art] three years | 16 |
|
| 9 | for [art] three years | 14 |
|
