| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is thought to | 324 |
|
| 2 | was thought to | 204 |
|
| 3 | are thought to | 168 |
|
| 4 | were thought to | 101 |
|
| 5 | be thought to | 50 |
|
| 6 | been thought to | 16 |
|
| 7 | 's thought to | 15 |
|
