| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long period | 305 |
|
| 2 | over [art] long period | 183 |
|
| 3 | for [art] long period | 71 |
|
| 4 | after [art] long period | 24 |
|
| 5 | [prep] the long period | 12 |
|
| 6 | during [art] long period | 11 |
|
| 7 | of [art] long period | 10 |
|
| 8 | to [art] long period | 5 |
|
| 9 | from [art] long period | 5 |
|
