| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] [noun sg] | 783 |
|
| 2 | [prep] a [det] years | 581 |
|
| 3 | [prep] [det] years [noun sg] | 57 |
|
| 4 | a [det] years [noun sg] | 30 |
|
