| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj] period | 704 |
|
| 2 | [noun sg] [prep] a [adj] period | 519 |
|
| 3 | [noun] over a [adj] period | 289 |
|
| 4 | [noun] for a [adj] period | 250 |
|
| 5 | [noun pl] [prep] a [adj] period | 200 |
|
| 6 | [noun] [prep] a long period | 177 |
|
| 7 | [noun] [prep] a long period | 137 |
|
| 8 | [noun] [prep] a [adj -er] period | 61 |
|
| 9 | [noun] [prep] a short period | 55 |
|
| 10 | [noun] of a [adj] period | 55 |
|
| 11 | [noun] [prep] a short period | 48 |
|
| 12 | [noun] within a [adj] period | 42 |
|
| 13 | [noun] [prep] a longer period | 40 |
|
| 14 | [noun] during a [adj] period | 30 |
|
| 15 | [noun] [prep] a specified period | 29 |
|
| 16 | [noun] [prep] a specified period | 29 |
|
| 17 | [noun prp] [prep] a [adj] period | 29 |
|
| 18 | [noun] after a [adj] period | 28 |
|
| 19 | [noun] [prep] a fixed period | 26 |
|
| 20 | [noun] [prep] a fixed period | 26 |
|
| 21 | [noun] [prep] a prolonged period | 25 |
|
| 22 | [noun] [prep] a prolonged period | 25 |
|
| 23 | [noun] in a [adj] period | 23 |
|
| 24 | [noun] [prep] a given period | 22 |
|
| 25 | [noun] [prep] a given period | 22 |
|
| 26 | [noun] [prep] a limited period | 20 |
|
| 27 | [noun] [prep] a limited period | 20 |
|
| 28 | [noun] [prep] a particular period | 17 |
|
| 29 | [n mass] [prep] a [adj] period | 17 |
|
| 30 | [noun] [prep] a five-year period | 17 |
|
