| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] it has been estimate that | 8 |
|
| 2 | [noun] it has be estimate that | 8 |
|
| 3 | [noun] it has [be] estimated that | 8 |
|
| 4 | [noun] it has [been] estimate that | 8 |
|
