| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be [adv] a | 187 |
|
| 2 | be [adv] a year | 140 |
|
| 3 | [vb past] [adv] a year | 65 |
|
| 4 | [vb past] be a year | 7 |
|
