| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] [adv] [adj] period [prep] | 10 |
|
| 2 | over [art] [adv] [adj] period of | 9 |
|
| 3 | over [art] [adv] [adj] period [prep] | 8 |
|
| 4 | over a [adv] [adj] period [prep] | 8 |
|
| 5 | over a [adv] [adj] period [prep] | 8 |
|
| 6 | over [art] [adv] short period [prep] | 5 |
|
| 7 | over [art] relatively [adj] period [prep] | 5 |
|
| 8 | over [art] [adv] short period [prep] | 5 |
|
| 9 | over [art] [adv] long period [prep] | 5 |
|
