| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [prep] least a | 10 |
|
| 2 | to [be] at least a | 10 |
|
| 3 | to be [prep] least a | 9 |
|
| 4 | to [be] [prep] least a | 9 |
|
| 5 | to [be] [prep] least a | 8 |
|
