| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] [adv] a [noun] | 78 |
|
| 2 | [Wh det] [verb] [adv] a year | 10 |
|
| 3 | [pron] [vb -s] [adv] a year | 9 |
|
| 4 | [Wh det] [vb -s] [adv] [art] year | 7 |
|
