| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] at [adj] time | 16 |
|
| 2 | [prep] [verb] at [adj] time | 14 |
|
| 3 | [prep] [verb] at [det] time | 13 |
|
| 4 | of [verb] at [adj] time | 9 |
|
| 5 | [prep] [verb] at [adj] times | 6 |
|
