| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in a [num] [noun] | 660 |
|
| 2 | in [art] [num] years | 509 |
|
| 3 | [prep] a [num] years | 236 |
|
| 4 | [prep] a [num] years | 236 |
|
| 5 | in a [adj] years | 181 |
|
| 6 | in a [num] [noun pl] | 147 |
|
| 7 | in a [num] year | 89 |
|
| 8 | in a [num] years | 68 |
|
