| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] long period [prep] [noun] | 19 |
|
| 2 | [adv] long period [prep] [noun sg] | 18 |
|
| 3 | [adv] long period of [noun] | 17 |
|
| 4 | [adv] long period [prep] [noun] | 16 |
|
| 5 | [adv] long period [prep] time | 13 |
|
| 6 | [adv] long period [prep] time | 13 |
|
| 7 | very long period [prep] [noun] | 8 |
|
| 8 | very long period [prep] [noun] | 8 |
|
