| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adv] long period of time | 13 |
|
| 2 | [art] [adv] long period of time | 13 |
|
| 3 | [art] [adv] long period of time | 13 |
|
| 4 | [art] [adv] long period of time | 13 |
|
| 5 | a [adv] long period of time | 13 |
|
| 6 | [art] [adv] long period of time | 10 |
|
| 7 | [art] very long period of time | 5 |
|
| 8 | [art] very long period of time | 5 |
|
