| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] at the [noun] | 310 |
|
| 2 | [prep] at the [noun sg] | 279 |
|
| 3 | [prep] [prep] the time | 112 |
|
| 4 | [prep] at [art] time | 45 |
|
| 5 | [prep] at the time | 41 |
|
| 6 | [prep] at the time | 41 |
|
