| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] year | 891 |
|
| 2 | [prep] a [num] year | 491 |
|
| 3 | [prep] a ten [noun] | 67 |
|
| 4 | [prep] a ten [noun sg] | 56 |
|
| 5 | [prep] [art] ten year | 39 |
|
| 6 | [prep] [art] ten year | 39 |
|
| 7 | [prep] a ten year | 24 |
|
| 8 | [prep] a ten year | 23 |
|
| 9 | [prep] a ten year | 23 |
|
| 10 | [prep] a ten year | 23 |
|
