| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a long period | 91 |
|
| 2 | [verb] [prep] a long period | 91 |
|
| 3 | [verb] over a [adj] period | 86 |
|
| 4 | [verb] over a long [noun] | 49 |
|
| 5 | [verb] over a long period | 46 |
|
| 6 | [verb] over [art] long period | 46 |
|
| 7 | [verb] over a long period | 46 |
|
| 8 | [verb] over [art] long period | 46 |
|
