| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [num] [prep] | 18821 |
|
| 2 | [noun] [prep] [num] years | 6781 |
|
| 3 | [prep] [num] years [prep] | 3213 |
|
| 4 | [noun] [prep] years [prep] | 387 |
|
| 5 | [noun] [num] years [prep] | 175 |
|
