| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been estimate at | 29 |
|
| 2 | have be estimated at | 29 |
|
| 3 | has be estimate at | 19 |
|
| 4 | had be estimate at | 5 |
|
| 5 | have be estimate at | 5 |
|
