| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [adv] a [noun] | 948 |
|
| 2 | at [adv] a [noun] | 751 |
|
| 3 | for at [adv] a | 178 |
|
| 4 | for at [adv] [noun] | 48 |
|
