| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] [noun] | 6833 |
|
| 2 | [prep] a [det] [noun pl] | 5841 |
|
| 3 | [prep] a [adj] years | 820 |
|
| 4 | [prep] [art] [det] years | 634 |
|
| 5 | [prep] a [det] year | 590 |
|
