| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [adv] a | 276 |
|
| 2 | [vb past] [adv] a year | 65 |
|
| 3 | it [adv] a year | 16 |
|
| 4 | it [vb past] a year | 14 |
|
