| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once or [adv] a year | 33 |
|
| 2 | [adv] or [adv] a year | 33 |
|
| 3 | once or [adv] a year | 33 |
|
| 4 | [adv] or [adv] a year | 33 |
|
| 5 | [noun] or [adv] a year | 13 |
|
| 6 | [n mass] or [adv] a year | 9 |
|
| 7 | or [adv] a year [verb] | 7 |
|
| 8 | or [adv] a year [prep] | 7 |
|
| 9 | or [adv] a year [prep] | 7 |
|
| 10 | or [adv] a year [to-vb] | 6 |
|
| 11 | or [adv] a year [pron] | 6 |
|
| 12 | or [adv] a year [adv] | 5 |
|
| 13 | or [adv] a year [pers pn] | 5 |
|
