| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adv] [adj] period | 31 |
|
| 2 | over [art] [adv] long period | 22 |
|
| 3 | over [art] [adv] [adj] period | 21 |
|
| 4 | over [art] [adv] [adj -er] period | 13 |
|
| 5 | over [art] [adv] longer period | 12 |
|
| 6 | over [art] [adv] short period | 10 |
|
| 7 | over [art] [adv] long period | 10 |
|
| 8 | over [art] much [adj] period | 10 |
|
| 9 | over [art] [adv] short period | 9 |
|
| 10 | over [art] relatively [adj] period | 7 |
|
| 11 | over [art] very [adj] period | 6 |
|
