| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a short period [prep] | 12 |
|
| 2 | [adv] [prep] a short period [prep] | 12 |
|
| 3 | [adv] for a short period [prep] | 7 |
|
| 4 | [adv] for a short period [prep] | 7 |
|
| 5 | [adv] a short period [prep] [noun] | 7 |
|
| 6 | [adv] a short period [prep] [noun sg] | 7 |
|
