| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] at the time | 225 |
|
| 2 | [adv] [vb pp] at the time | 145 |
|
| 3 | [adv] investigated at the [noun] | 7 |
|
| 4 | [adv] investigated [prep] the time | 6 |
|
| 5 | [adv] investigated at [art] time | 6 |
|
| 6 | [adv] investigate at the time | 6 |
|
| 7 | [adv] investigated [prep] the time | 6 |
|
| 8 | [adv] investigated at the time | 6 |
|
