| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was properly investigated at [art] time | 5 |
|
| 2 | be properly investigated at [art] time | 5 |
|
| 3 | [was/were] properly investigated at [art] time | 5 |
|
| 4 | [be] properly investigated at [art] time | 5 |
|
| 5 | properly investigated at [art] time of | 5 |
|
| 6 | properly investigated at [art] time [prep] | 5 |
|
| 7 | properly investigated at [art] time [prep] | 5 |
|
| 8 | properly investigated at [art] time of | 5 |
|
