| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] very long period of [noun sg] | 7 |
|
| 2 | [art] very long period of [noun] | 7 |
|
| 3 | [art] very long period of time | 5 |
|
| 4 | [art] very long period of time | 5 |
|
