| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | up [prep] three years | 51 |
|
| 2 | up [prep] three years | 51 |
|
| 3 | up [prep] three years | 51 |
|
| 4 | up to three years | 47 |
|
| 5 | up to three years | 47 |
|
