| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at that time | 73 |
|
| 2 | [vb past] at this time | 47 |
|
| 3 | had at [det] time | 28 |
|
| 4 | [vb past] at any time | 11 |
|
| 5 | [vb past] at some time | 7 |
|
| 6 | existed at [det] time | 6 |
|
| 7 | [vb past] at half time | 5 |
|
| 8 | did at [det] time | 5 |
|
