| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] very long period | 15 |
|
| 2 | [art] very long period | 15 |
|
| 3 | a very long period | 14 |
|
| 4 | a very long period | 14 |
|
| 5 | [prep] very long period | 7 |
|
| 6 | [prep] very long period | 7 |
|
| 7 | for very long period | 6 |
|
| 8 | for very long period | 6 |
|
| 9 | very long period [prep] | 13 |
|
| 10 | very long period [prep] | 13 |
|
| 11 | very long period of | 11 |
|
| 12 | very long period of | 11 |
|
