| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] [prep] a | 2142 |
|
| 2 | 's [not/n't] a | 1877 |
|
| 3 | 's [prep] a | 1413 |
|
| 4 | 's [not/n't] [prep] | 1229 |
|
