| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] for a period [prep] | 75 |
|
| 2 | for a long period [prep] | 33 |
|
| 3 | [verb] for a long period | 29 |
|
| 4 | [verb] a long period [prep] | 26 |
|
