| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [prep] [num ord] | 20 |
|
| 2 | at least [prep] [num ord] | 19 |
|
| 3 | at least [prep] [num ord] | 19 |
|
| 4 | at [adv] [prep] first | 17 |
|
| 5 | at [adv] at [num ord] | 16 |
|
