| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] at least [art] | 10 |
|
| 2 | of [v-ing] at least [art] | 7 |
|
| 3 | [prep] [v-ing] at least a | 7 |
|
| 4 | of [v-ing] at least [art] | 7 |
|
