| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] at [adj] time | 553 |
|
| 2 | [prep] [noun prp] at [adj] [noun] | 440 |
|
| 3 | [prep] [noun prp] [prep] [adj] time | 294 |
|
| 4 | [prep] [noun prp] at [adj] time | 184 |
|
