| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] [adj -er] period of [noun] | 7 |
|
| 2 | over [art] [adj -er] period [prep] [noun] | 7 |
|
| 3 | over a [adj -er] period [prep] [noun] | 7 |
|
| 4 | over [art] [adj -er] period [prep] time | 7 |
|
| 5 | over a [adj -er] period [prep] [noun] | 7 |
|
| 6 | over [art] [adj -er] period [prep] time | 7 |
|
| 7 | over [art] [adj -er] period [prep] [noun sg] | 7 |
|
| 8 | over [art] longer period [prep] [noun] | 6 |
|
