| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years and | 872 |
|
| 2 | [prep] a [num] and | 487 |
|
| 3 | [prep] a [num] years | 236 |
|
| 4 | a [num] years and | 13 |
|
