| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] at the time of | 57 |
|
| 2 | [adv] investigate at the time of | 5 |
|
| 3 | [adv] investigate at the [noun] of | 5 |
|
| 4 | [adv] investigate at the time of | 5 |
|
| 5 | [adv] investigate at [art] time of | 5 |
|
| 6 | [adv] investigate at the time [prep] | 5 |
|
| 7 | [adv] investigate [prep] the time of | 5 |
|
| 8 | [adv] investigate at [art] time of | 5 |
|
| 9 | [adv] investigate at the time of | 5 |
|
| 10 | [adv] investigate at the time [prep] | 5 |
|
| 11 | [adv] investigate at the [noun sg] of | 5 |
|
