| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [adv] [prep] [art] period | 12 |
|
| 2 | [vb -s] [adv] [prep] [art] period | 10 |
|
| 3 | [vb -s] [adv] [prep] a period | 6 |
|
| 4 | [vb -s] [adv] [prep] the period | 6 |
|
