| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [prep] a period | 47 |
|
| 2 | and [prep] a period | 38 |
|
| 3 | and [prep] a period | 38 |
|
| 4 | [conj] over a period | 29 |
|
| 5 | [conj] for a period | 22 |
|
| 6 | that [prep] a period | 20 |
|
| 7 | that [prep] a period | 20 |
|
| 8 | [that] [prep] a period | 20 |
|
| 9 | [conj] after a period | 11 |
|
| 10 | [subord] [prep] a period | 9 |
|
| 11 | [conj] in a period | 9 |
|
| 12 | but [prep] a period | 6 |
|
| 13 | but [prep] a period | 6 |
|
