| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a | 753779 |
|
| 2 | [prep] a | 753768 |
|
| 3 | at [art] | 181665 |
|
| 4 | at [art] | 181665 |
|
| 5 | at a | 29107 |
|
| 6 | at a | 25294 |
|
