| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a period [prep] weeks | 22 |
|
| 2 | [art] period [prep] weeks | 22 |
|
| 3 | [art] period [prep] weeks | 22 |
|
| 4 | a period [prep] weeks | 22 |
|
| 5 | period [prep] [adj] weeks | 70 |
|
| 6 | period [prep] [num] weeks | 59 |
|
| 7 | period [prep] [det] weeks | 11 |
|
| 8 | period [prep] two weeks | 10 |
|
| 9 | period [prep] two weeks | 10 |
|
| 10 | period [prep] three weeks | 9 |
|
| 11 | period [prep] three weeks | 9 |
|
| 12 | period [prep] several weeks | 9 |
|
| 13 | period [prep] several weeks | 9 |
|
| 14 | period [prep] six weeks | 7 |
|
| 15 | period [prep] four weeks | 7 |
|
| 16 | period [prep] six weeks | 7 |
|
| 17 | period [prep] four weeks | 7 |
|
| 18 | period [prep] weeks [conj] | 11 |
|
| 19 | period [prep] weeks [coord] | 10 |
|
| 20 | period [prep] weeks and | 6 |
|
| 21 | period [prep] weeks and | 6 |
|
