| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [prep] a | 2509 |
|
| 2 | [prep] [prep] a | 2506 |
|
| 3 | at [prep] [art] | 743 |
|
| 4 | at [prep] [art] | 743 |
|
| 5 | at [prep] a | 145 |
|
| 6 | at [prep] a | 126 |
|
| 7 | at [prep] a | 126 |
|
