| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] | 16739 |
|
| 2 | at a [noun sg] | 15818 |
|
| 3 | at [art] end | 10723 |
|
| 4 | [prep] a end | 1434 |
|
| 5 | at a end | 130 |
|
