| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a short time | 376 |
|
| 2 | [conj] [prep] a time | 182 |
|
| 3 | [conj] [prep] a short | 99 |
|
| 4 | [conj] a short time | 15 |
|
