| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun sg] [prep] a [adj] period | 39 |
|
| 2 | of [noun sg] over a [adj] period | 17 |
|
| 3 | of [noun sg] over a [adj] period | 17 |
|
| 4 | of [noun sg] [prep] a long period | 15 |
|
| 5 | of [noun sg] for a [adj] period | 13 |
|
| 6 | of [noun sg] for a [adj] period | 13 |
|
