| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a [adj] period [prep] | 53 |
|
| 2 | [adv] [vb infin] a [adj] [prep] | 49 |
|
| 3 | [vb infin] a [adj] period [prep] | 18 |
|
| 4 | [adv] [vb infin] a [adj] period | 7 |
|
| 5 | [adv] [vb infin] a period [prep] | 6 |
|
