| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] a year | 65 |
|
| 2 | [vb past] [adv] a year | 51 |
|
| 3 | [verb] twice a year | 42 |
|
| 4 | [vb past] twice a [noun sg] | 12 |
|
| 5 | [vb past] twice a [noun] | 12 |
|
| 6 | [vb past] twice a year | 7 |
|
| 7 | [vb past] twice [art] year | 7 |
|
| 8 | [vb past] twice [art] year | 7 |
|
| 9 | [vb past] twice a year | 7 |
|
| 10 | [vb past] twice a year | 7 |
|
