| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for a period [prep] | 190 |
|
| 2 | for a long period [prep] | 27 |
|
| 3 | [noun] for long period [prep] | 25 |
|
| 4 | [noun] for a long period | 24 |
|
