| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] period [prep] | 250 |
|
| 2 | [adv] short period [prep] | 67 |
|
| 3 | [adv] shorter [noun] [prep] | 23 |
|
| 4 | [adv] shorter [noun sg] [prep] | 14 |
|
| 5 | [adv] [adj -er] period [prep] | 11 |
|
| 6 | [adv] shorter period [prep] | 7 |
|
