| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [num] [unc] [no cls] | 421 |
|
| 2 | at least [adj] [unc] [no cls] | 270 |
|
| 3 | [prep] least [num] [unc] [no cls] | 269 |
|
| 4 | at least [num] [unc] [unc] | 269 |
|
