| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] year | 891 |
|
| 2 | [prep] a [num] year | 491 |
|
| 3 | [prep] a two [noun] | 251 |
|
| 4 | [prep] a two [noun sg] | 242 |
|
| 5 | [prep] [art] two year | 85 |
|
| 6 | [prep] [art] two year | 85 |
|
| 7 | [prep] a two year | 67 |
|
| 8 | [prep] a two year | 66 |
|
| 9 | [prep] a two year | 66 |
|
| 10 | [prep] a two year | 66 |
|
