| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [verb] at [num ord] | 18 |
|
| 2 | [prep] [v-ing] at [num ord] | 17 |
|
| 3 | [prep] [verb] at last | 8 |
|
| 4 | [prep] [verb] at first | 6 |
|
| 5 | before [verb] at [num ord] | 5 |
|
| 6 | before [verb] at [num ord] | 5 |
|
