| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be estimated [that] about [num] | 7 |
|
| 2 | it be estimated [that] about [adj] | 7 |
|
| 3 | it be estimated that about [adj] | 7 |
|
| 4 | it is estimated [that] about [adj] | 6 |
|
