| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 773 |
|
| 2 | [adv prt] [prep] a [adj] [prep] | 61 |
|
| 3 | [adv prt] [prep] a period [prep] | 44 |
|
| 4 | [adv prt] [prep] a [adj] period | 43 |
|
| 5 | [adv prt] a [adj] period [prep] | 23 |
|
| 6 | [adv prt] [prep] [adj] period [prep] | 9 |
|
