| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a long period [prep] | 245 |
|
| 2 | [art] long period [prep] | 243 |
|
| 3 | [art] long period of | 240 |
|
| 4 | the long period [prep] | 43 |
|
| 5 | [art] longer period [prep] | 30 |
|
| 6 | [art] longest period [prep] | 15 |
|
| 7 | [art] long period in | 12 |
|
| 8 | [art] long period during | 9 |
|
| 9 | [art] long period for | 5 |
|
