| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] for a long period | 29 |
|
| 2 | [verb] for a long period | 22 |
|
| 3 | [vb pp] for a long period | 14 |
|
| 4 | [verb] for a longer period | 7 |
|
