| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [prep] [num] | 16861 |
|
| 2 | [noun] [prep] [num] years | 6781 |
|
| 3 | a [noun] [prep] years | 1236 |
|
| 4 | a [noun] [num] years | 148 |
|
