| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the time [prep] | 491 |
|
| 2 | investigate at [art] time [prep] | 5 |
|
| 3 | investigate at [art] time [prep] | 5 |
|
| 4 | investigate [prep] the time [prep] | 5 |
|
| 5 | investigate at the time [prep] | 5 |
|
| 6 | investigate at the [noun sg] [prep] | 5 |
|
| 7 | investigate at the [noun] [prep] | 5 |
|
| 8 | investigate at the time [prep] | 5 |
|
| 9 | investigate at the time [prep] | 5 |
|
