| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [not/n't] gone unnoticed | 20 |
|
| 2 | have not gone unnoticed | 16 |
|
| 3 | had [not/n't] gone unnoticed | 10 |
|
| 4 | has [not/n't] gone unnoticed | 5 |
|
| 5 | have [not/n't] gone unnoticed | 5 |
|
