| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | take place [prep] a period of | 6 |
|
| 2 | [verb] place [prep] a period of | 6 |
|
| 3 | place [prep] a [adj] period of | 5 |
|
| 4 | place [prep] a [adj] period of | 5 |
|
| 5 | place [prep] a period of [noun] | 6 |
|
