| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] [prep] long periods [prep] | 7 |
|
| 2 | [verb] [adv] [prep] long period [prep] | 7 |
|
| 3 | [verb] [adv] [prep] long period of | 6 |
|
