| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a sign of [art] [noun sg] | 11 |
|
| 2 | [adv] a sign [prep] a [noun sg] | 8 |
|
| 3 | [adv] a sign [prep] [art] [noun sg] | 7 |
|
| 4 | [not/n't] a sign [prep] [art] [noun sg] | 5 |
|
| 5 | not a sign [prep] [art] [noun sg] | 5 |
|
| 6 | not a sign [prep] [art] [noun sg] | 5 |
|
