| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 430262 |
|
| 2 | [prep] [art] years | 3267 |
|
| 3 | [prep] [art] years | 3267 |
|
| 4 | [prep] a [noun pl] | 2925 |
|
| 5 | [prep] a year | 1994 |
|
| 6 | [prep] a years | 5 |
|
