| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] a [noun] [prep] | 3064 |
|
| 2 | [adv] a period [prep] | 117 |
|
| 3 | [not/n't] [art] period [prep] | 9 |
|
| 4 | [not/n't] [art] period [prep] | 9 |
|
| 5 | [not/n't] a period [prep] | 7 |
|
