| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at this [noun] | 1489 |
|
| 2 | [verb] at this [noun sg] | 1460 |
|
| 3 | [verb] [prep] this period | 231 |
|
| 4 | [verb] [prep] this period | 231 |
|
| 5 | [verb] at [det] period | 29 |
|
| 6 | [verb] at [adj] period | 29 |
|
| 7 | [verb] at this period | 21 |
|
| 8 | [verb] at this period | 21 |
|
| 9 | [verb] at this period | 21 |
|
