| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a long [noun] of | 1106 |
|
| 2 | a [adj] period of | 842 |
|
| 3 | [art] long period of | 252 |
|
| 4 | [art] long period of | 252 |
|
| 5 | a long period [prep] | 245 |
|
| 6 | a long period [prep] | 245 |
|
| 7 | a long period of | 205 |
|
| 8 | a long period of | 205 |
|
