| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] period [prep] about | 47 |
|
| 2 | [art] period [prep] about | 47 |
|
| 3 | a period [prep] about | 42 |
|
| 4 | a period [prep] about | 42 |
|
| 5 | [adj] period [prep] about | 14 |
|
| 6 | [adj] period [prep] about | 8 |
|
| 7 | [noun sg] period [prep] about | 5 |
|
| 8 | the period [prep] about | 5 |
|
| 9 | [noun] period [prep] about | 5 |
|
| 10 | the period [prep] about | 5 |
|
| 11 | period [prep] about [adj] | 58 |
|
| 12 | period [prep] about [num] | 57 |
|
| 13 | period [prep] about [art] | 7 |
|
| 14 | period [prep] about a | 7 |
|
| 15 | period [prep] about [art] | 7 |
|
| 16 | period [prep] about a | 7 |
|
| 17 | period [prep] about five | 5 |
|
| 18 | period [prep] about five | 5 |
|
