| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [det] years | 170 |
|
| 2 | [prep] a [det] years [unc] | 27 |
|
| 3 | [noun] [prep] [det] years [unc] | 23 |
|
| 4 | [noun] [prep] a [det] [unc] | 5 |
|
