| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] a [noun] | 744 |
|
| 2 | [prep] [adv] a year | 355 |
|
| 3 | [prep] [adv] a year | 355 |
|
| 4 | at [adv] [art] year | 75 |
|
| 5 | at [adv] a year | 71 |
|
| 6 | at [adv] a year | 71 |
|
