| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adv] [adj] period [prep] | 72 |
|
| 2 | [prep] a [adv] [adj] period [prep] | 72 |
|
| 3 | over a [adv] [adj] [noun] [prep] | 26 |
|
| 4 | over a [adv] [adj] [noun sg] [prep] | 25 |
|
| 5 | over [art] [adv] [adj] period [prep] | 10 |
|
| 6 | over [art] [adv] [adj] period [prep] | 10 |
|
| 7 | over a [adv] [adj] period [prep] | 8 |
|
| 8 | over a [adv] [adj] period [prep] | 8 |
|
| 9 | over a [adv] [adj] period [prep] | 8 |
|
| 10 | over a [adv] [adj] period [prep] | 8 |
|
