| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [noun] at the | 1268 |
|
| 2 | [prep] [noun] at the time | 592 |
|
| 3 | [prep] [pron] at the time | 173 |
|
| 4 | [pron] [noun] at the time | 171 |
|
