| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] [adv] long period of | 12 |
|
| 2 | [prep] [art] [adv] long period of | 12 |
|
| 3 | for [art] [adv] long period of | 6 |
|
| 4 | for [art] [adv] long period of | 6 |
|
| 5 | over [art] [adv] long period of | 5 |
|
| 6 | over [art] [adv] long period of | 5 |
|
| 7 | [art] [adv] long period of [noun] | 16 |
|
| 8 | [art] [adv] long period of [noun sg] | 16 |
|
| 9 | [art] [adv] long period of time | 13 |
|
| 10 | [art] [adv] long period of time | 13 |
|
| 11 | [art] [adv] long period of [adj] | 5 |
|
