| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [art] short time | 20 |
|
| 2 | [vb past] a short time | 20 |
|
| 3 | [vb past] a short time | 20 |
|
| 4 | spent [art] short time | 5 |
|
