| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] [prep] a [noun] | 3561 |
|
| 2 | [prep] [pron] [prep] a [noun sg] | 3462 |
|
| 3 | [prep] [pron] [prep] [art] period | 18 |
|
| 4 | [prep] [pron] [prep] a period | 11 |
|
| 5 | [prep] [pron] [prep] a period | 11 |
|
