| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [num ord] | 84 |
|
| 2 | at a first | 23 |
|
| 3 | at a third | 22 |
|
| 4 | at a second | 16 |
|
| 5 | at a tenth | 7 |
|
