| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] a [adv] | 141 |
|
| 2 | [prep] [adv] a [adv] | 129 |
|
| 3 | [prep] perhaps [art] [adv] | 32 |
|
| 4 | [prep] perhaps a [adv] | 9 |
|
| 5 | [prep] perhaps a [adv] | 9 |
|
