| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] years | 581 |
|
| 2 | [conj] [prep] a [det] | 554 |
|
| 3 | [conj] a [det] years | 481 |
|
| 4 | [conj] [prep] [det] years | 148 |
|
