| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a long period | 91 |
|
| 2 | develop [prep] a long [noun sg] | 7 |
|
| 3 | develop [prep] a [adj] period | 7 |
|
| 4 | develop [prep] a long [noun] | 7 |
|
| 5 | develop [prep] a long period | 5 |
|
| 6 | develop [prep] a long period | 5 |
|
| 7 | develop [prep] [art] long period | 5 |
|
