| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a [adj] period | 756 |
|
| 2 | for a long period | 101 |
|
| 3 | [prep] a longer period | 86 |
|
| 4 | for a longer [noun] | 70 |
|
| 5 | for a longer [noun sg] | 70 |
|
| 6 | for a [adj -er] period | 65 |
|
| 7 | for [art] longer period | 32 |
|
| 8 | for a longer period | 30 |
|
