| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | minimum of [num] years [unc] | 11 |
|
| 2 | minimum [prep] [num] years ['s] | 11 |
|
| 3 | minimum [prep] [num] years ' | 11 |
|
| 4 | minimum [prep] [num] years ' | 11 |
|
