| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [art] period of [noun sg] | 16 |
|
| 2 | and [art] period of [noun] | 16 |
|
| 3 | and [art] period of [noun] | 16 |
|
| 4 | and a period of [noun] | 10 |
|
| 5 | and the period of [noun] | 6 |
|
