| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [unc] | 1205 |
|
| 2 | [prep] a [adj] years | 820 |
|
| 3 | [prep] [adj] years [unc] | 817 |
|
| 4 | a [adj] years [unc] | 56 |
|
