| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [prep] [det] time | 71 |
|
| 2 | at [prep] [det] time | 71 |
|
| 3 | at about [det] [noun] | 69 |
|
| 4 | [prep] about [det] time | 65 |
|
| 5 | [prep] about [det] time | 65 |
|
| 6 | at about [adj] time | 60 |
|
| 7 | at about [det] time | 60 |
|
| 8 | at about [det] time | 60 |
|
