| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [adj] period of | 156 |
|
| 2 | [adv] [adj] period of | 132 |
|
| 3 | [adv] long [noun] of | 106 |
|
| 4 | [adv] long [noun sg] of | 57 |
|
| 5 | [adv] long period of | 40 |
|
| 6 | [adv] long period of | 26 |
|
| 7 | [adv] long period [prep] | 24 |
|
