| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [to-vb] [adv] [prep] a | 525 |
|
| 2 | [noun] [adv] [prep] a while | 42 |
|
| 3 | [to-vb] [adv] [prep] a while | 37 |
|
| 4 | [noun] [to-vb] [prep] a while | 9 |
|
