| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at [noun] | 5964 |
|
| 2 | then [vb past] [noun] | 794 |
|
| 3 | then at [noun] | 181 |
|
| 4 | then [vb past] at | 168 |
|
