| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] a [num ord] of | 23 |
|
| 2 | at [adv] a [num ord] of | 23 |
|
| 3 | at [adv] a third of | 19 |
|
| 4 | at least a [num ord] of | 16 |
|
| 5 | at least a [num ord] of | 16 |
|
