| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [prep] a [noun] [prep] | 4233 |
|
| 2 | [conj] [prep] a [noun sg] [prep] | 4084 |
|
| 3 | [conj] [prep] [art] period [prep] | 106 |
|
| 4 | [conj] [prep] a period [prep] | 57 |
|
| 5 | [conj] [prep] a period [prep] | 57 |
|
