| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [noun sg] [prep] a [noun] of | 400 |
|
| 2 | [coord] [noun sg] [prep] a [noun sg] of | 375 |
|
| 3 | [coord] [noun] [prep] a period of | 18 |
|
| 4 | [coord] [noun sg] [prep] [art] period of | 16 |
|
| 5 | [coord] [noun sg] [prep] a period of | 9 |
|
| 6 | [conj] [noun sg] [prep] a period of | 9 |
|
| 7 | [coord] [noun sg] [prep] a period [prep] | 9 |
|
| 8 | [coord] [noun sg] [prep] a period of | 9 |
|
