| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [prep] a [noun] of | 1103 |
|
| 2 | [conj] [prep] a period of | 51 |
|
| 3 | [coord] [prep] a period of | 32 |
|
| 4 | and [prep] [art] period of | 32 |
|
| 5 | and [prep] a period [prep] | 26 |
|
| 6 | and [prep] a period [prep] | 26 |
|
| 7 | and [prep] a period of | 23 |
|
| 8 | and [prep] a period of | 23 |
|
