| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [art] much long period | 6 |
|
| 2 | for a much long period | 6 |
|
| 3 | for [art] much long period | 6 |
|
| 4 | for [art] much long period | 6 |
|
| 5 | for a much long period | 6 |
|
| 6 | for [art] much longer period | 6 |
|
