| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] at [art] time of | 60 |
|
| 2 | [adv] investigate at [art] time of | 5 |
|
| 3 | [adv] investigate at [art] [noun] of | 5 |
|
| 4 | [adv] investigate at [art] [noun sg] of | 5 |
|
| 5 | [adv] investigate at [art] time of | 5 |
|
| 6 | [adv] investigate at [art] time [prep] | 5 |
|
| 7 | [adv] investigate [prep] [art] time of | 5 |
|
| 8 | [adv] investigate [prep] [art] time of | 5 |
|
