| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | through a [noun] | 3547 |
|
| 2 | through a [noun sg] | 3247 |
|
| 3 | [prep] a period | 2137 |
|
| 4 | through [art] period | 82 |
|
| 5 | through [art] period | 82 |
|
| 6 | through a period | 55 |
|
| 7 | through a period | 55 |
|
