| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [noun] [prep] [art] period [prep] | 7 |
|
| 2 | [vb -s] [noun] [prep] a period [prep] | 5 |
|
| 3 | [vb -s] [noun] [prep] [art] period of | 5 |
|
| 4 | [vb -s] [noun sg] [prep] [art] period [prep] | 5 |
|
| 5 | [vb -s] [noun] [prep] [art] period of | 5 |
|
