| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] [num] years | 408 |
|
| 2 | [prep] [num] years time | 122 |
|
| 3 | [num] [num] years time | 6 |
|
| 4 | [prep] [num] [num] time | 5 |
|
