| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [prep] a [noun] | 3899 |
|
| 2 | it [prep] a [noun sg] | 3734 |
|
| 3 | [pron] [prep] a while | 261 |
|
| 4 | it [prep] a while | 76 |
|
| 5 | it [prep] a while | 76 |
|
| 6 | it [prep] [art] while | 76 |
|
| 7 | it [prep] [art] while | 76 |
|
