| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun pl] [prep] a [adj] period | 23 |
|
| 2 | of [noun] [prep] a long period | 22 |
|
| 3 | [prep] [noun pl] [prep] a long period | 9 |
|
| 4 | [prep] [noun pl] [prep] a long period | 9 |
|
| 5 | of [noun pl] [prep] a long [noun sg] | 7 |
|
| 6 | of [noun pl] [prep] a long [noun] | 7 |
|
| 7 | of [noun pl] [prep] [art] long period | 5 |
|
| 8 | of [noun pl] [prep] a long period | 5 |
|
| 9 | of [noun pl] [prep] a long period | 5 |
|
| 10 | of [noun pl] [prep] [art] long period | 5 |
|
| 11 | of [noun pl] [prep] a long period | 5 |
|
