| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [adv] long period of | 18 |
|
| 2 | [art] [adv] long period of | 18 |
|
| 3 | a [adv] long period of | 13 |
|
| 4 | a [adv] long period of | 12 |
|
| 5 | the [adv] long period of | 5 |
|
| 6 | the [adv] long period of | 5 |
|
| 7 | [adv] [art] long period of | 12 |
|
| 8 | [adv] [art] long period of | 12 |
|
| 9 | [adv] a long period of | 12 |
|
| 10 | [adv] a long period of | 12 |
|
| 11 | [adv] long period of [noun sg] | 14 |
|
| 12 | [adv] long period of [noun] | 14 |
|
| 13 | [adv] long period of time | 10 |
|
| 14 | [adv] long period of time | 10 |
|
| 15 | [adv] long period of [adj] | 7 |
|
