| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] at [adv] a year | 12 |
|
| 2 | [noun] [prep] at [adv] a year | 12 |
|
| 3 | [noun] for at [adv] a year | 11 |
|
| 4 | [noun] for at [adv] a year | 11 |
|
| 5 | [noun] at least [adv] a year | 14 |
|
| 6 | [noun] at least [adv] a year | 14 |
|
| 7 | [noun] at [adv] [adv] a year | 14 |
|
| 8 | [noun] at [adv] [adv] a year | 14 |
|
| 9 | [noun] at [adv] [adv] a year | 14 |
|
| 10 | [noun] at [adv] [adv] a year | 14 |
|
| 11 | [noun] at [adv] once a year | 12 |
|
| 12 | [noun] at [adv] once a year | 12 |
|
