| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] at [adv] a [noun] | 91 |
|
| 2 | [noun] [prep] at [adv] [art] year | 13 |
|
| 3 | [noun] [prep] [prep] [adv] a year | 12 |
|
| 4 | [noun] [prep] at [adv] a year | 12 |
|
| 5 | [noun] [prep] at [adv] a year | 12 |
|
| 6 | [noun] [prep] [prep] [adv] a year | 12 |
|
| 7 | [noun] [prep] at [adv] a year | 12 |
|
