| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] long period | 348 |
|
| 2 | [prep] long periods | 347 |
|
| 3 | for long period | 269 |
|
| 4 | for long period | 269 |
|
| 5 | over long period | 48 |
|
| 6 | over long period | 48 |
|
| 7 | to long period | 6 |
|
| 8 | of long period | 6 |
|
| 9 | of long period | 6 |
|
| 10 | to long period | 6 |
|
| 11 | with long period | 5 |
|
| 12 | from long period | 5 |
|
| 13 | from long period | 5 |
|
| 14 | with long period | 5 |
|
