| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long period of | 152 |
|
| 2 | of a long [noun] of | 99 |
|
| 3 | of a long [noun sg] of | 88 |
|
| 4 | of a [adj] period of | 27 |
|
| 5 | of [art] long period of | 14 |
|
| 6 | of [art] long period of | 14 |
|
| 7 | of a long period of | 11 |
|
| 8 | of a long period of | 11 |
|
| 9 | of a long period [prep] | 11 |
|
| 10 | of a long period of | 11 |
|
| 11 | of a long period [prep] | 11 |
|
