| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [pos pn] best [verb] | 12 |
|
| 2 | at its best [verb] | 8 |
|
| 3 | at its best [verb] | 8 |
|
| 4 | at [pron] best [v-ing] | 7 |
|
