| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [prep] a [noun] [art] | 264 |
|
| 2 | [conj] [prep] a [noun sg] [art] | 262 |
|
| 3 | [conj] [prep] a while [art] | 23 |
|
| 4 | [conj] [prep] [art] while [art] | 23 |
|
