| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [adv prt] [prep] a [adj] period | 20 |
|
| 2 | [vb pp] [adv prt] [prep] a [adj] period | 20 |
|
| 3 | [vb pp] [adv prt] over a [adj] period | 11 |
|
| 4 | [vb pp] [adv prt] over a [adj] period | 11 |
|
| 5 | [vb pp] [adv prt] for a [adj] period | 5 |
|
| 6 | [vb pp] [adv prt] for a [adj] period | 5 |
|
