| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adv] a year [adv] | 99 |
|
| 2 | [vb past] [adv] a year [adv] | 28 |
|
| 3 | [vb past] [adv] [adv] a year | 23 |
|
| 4 | [vb past] [adv] a year [adv] | 18 |
|
