| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not been successful | 21 |
|
| 2 | have not been successful | 19 |
|
| 3 | have not been successful | 8 |
|
| 4 | has not been successful | 7 |
|
| 5 | had not been successful | 6 |
|
