| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [noun sg] [prep] a [adj] period | 20 |
|
| 2 | [to-vb] [noun] [prep] a [adj] period | 13 |
|
| 3 | [verb] [noun] over a [adj] period | 12 |
|
| 4 | [verb] [noun pl] [prep] a [adj] period | 11 |
|
| 5 | [verb] [noun] for a [adj] period | 10 |
|
| 6 | take [noun] [prep] a [adj] period | 8 |
|
| 7 | [verb] place [prep] a [adj] period | 7 |
|
| 8 | [verb] place [prep] a [adj] period | 7 |
|
| 9 | [verb] [noun] [prep] a long period | 6 |
|
| 10 | [vb past] [noun] [prep] a [adj] period | 5 |
|
| 11 | [v-ing] [noun] [prep] a [adj] period | 5 |
|
