| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] long period [prep] time | 16 |
|
| 2 | [verb] [prep] long period [prep] time | 16 |
|
| 3 | [verb] for long period [prep] time | 14 |
|
| 4 | [verb] for long period [prep] time | 14 |
|
| 5 | [verb] [adv] long period [prep] time | 5 |
|
