| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun] [prep] a [adj] period | 67 |
|
| 2 | of [noun sg] [prep] a [adj] period | 39 |
|
| 3 | of [noun] over a [adj] period | 30 |
|
| 4 | of [noun pl] [prep] a [adj] period | 19 |
|
| 5 | of [noun] for a [adj] period | 18 |
|
| 6 | of [noun] [prep] a long period | 18 |
|
| 7 | of [noun] [prep] a short period | 6 |
|
| 8 | of [noun] within a [adj] period | 5 |
|
| 9 | of [noun] after a [adj] period | 5 |
|
| 10 | of [n mass] [prep] a [adj] period | 5 |
|
