| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | or [prep] [adv] a | 101 |
|
| 2 | or [prep] least a | 99 |
|
| 3 | or at [adv] a | 99 |
|
| 4 | or [prep] [adv] a | 82 |
|
| 5 | or [prep] [adv] an | 19 |
|
