| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [art] long period of | 77 |
|
| 2 | [noun pl] [prep] [art] [adj] period of | 77 |
|
| 3 | [noun pl] [prep] [art] long [noun] of | 49 |
|
| 4 | [noun pl] [prep] [art] long [noun sg] of | 41 |
|
| 5 | [noun pl] [prep] [art] long period [prep] | 13 |
|
| 6 | [noun pl] [prep] [art] long period [prep] | 13 |
|
| 7 | [noun pl] [prep] [art] long period of | 12 |
|
| 8 | [noun pl] [prep] [art] long period of | 12 |
|
