| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [subord] a [noun sg] | 323 |
|
| 2 | [subord] at a [noun sg] | 60 |
|
| 3 | [prep] at a [noun sg] | 21 |
|
| 4 | [prep] [subord] at a | 12 |
|
