| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a sign of [noun sg] | 36 |
|
| 2 | [adv] a sign [prep] [noun sg] | 22 |
|
| 3 | not a sign [prep] [noun sg] | 14 |
|
| 4 | not a sign [prep] [noun sg] | 14 |
|
| 5 | [not/n't] a sign [prep] [noun sg] | 14 |
|
