| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [prep] an | 3377 |
|
| 2 | a [noun sg] [prep] an | 3298 |
|
| 3 | a period [prep] [art] | 124 |
|
| 4 | a period [prep] [art] | 124 |
|
| 5 | a period [prep] a | 70 |
|
| 6 | [art] period [prep] an | 11 |
|
| 7 | [art] period [prep] an | 11 |
|
| 8 | a period [prep] an | 7 |
|
| 9 | a period [prep] an | 7 |
|
| 10 | a period [prep] an | 7 |
|
