| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a minimum [prep] [num] years [prep] | 5 |
|
| 2 | a minimum [prep] [num] years [prep] | 5 |
|
| 3 | [art] minimum [prep] [num] years [prep] | 5 |
|
| 4 | [art] minimum [prep] [num] years [prep] | 5 |
|
