| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a [adj] period of | 177 |
|
| 2 | [prep] a long period of | 152 |
|
| 3 | for a long [noun] of | 36 |
|
| 4 | for a long [noun sg] of | 36 |
|
| 5 | for a long period [prep] | 33 |
|
| 6 | for a long period [prep] | 33 |
|
| 7 | for [art] long period of | 23 |
|
| 8 | for [art] long period of | 23 |
|
| 9 | for a long period of | 21 |
|
| 10 | for a long period of | 21 |
|
| 11 | for a long period of | 21 |
|
