| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a [adv] [adj] period of | 13 |
|
| 2 | for a [adv] short period of | 7 |
|
| 3 | for a [adv] long period of | 6 |
|
| 4 | for a very [adj] period of | 5 |
|
| 5 | for a [adv] short period of | 5 |
|
