| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a [noun] | 42160 |
|
| 2 | [prep] a period | 2137 |
|
| 3 | [prep] a period | 2137 |
|
| 4 | for [art] period | 948 |
|
| 5 | for [art] period | 948 |
|
| 6 | for a period | 518 |
|
| 7 | for a period | 517 |
|
