| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for an [adj] period [prep] | 48 |
|
| 2 | for an indefinite [noun] [prep] | 9 |
|
| 3 | for an indefinite [noun sg] [prep] | 9 |
|
| 4 | [prep] an indefinite period [prep] | 8 |
|
| 5 | [prep] an indefinite period [prep] | 8 |
|
| 6 | for an indefinite period [prep] | 6 |
|
| 7 | for [art] indefinite period [prep] | 6 |
|
| 8 | for an indefinite period [prep] | 6 |
|
| 9 | for [art] indefinite period [prep] | 6 |
|
| 10 | for an indefinite period [prep] | 6 |
|
| 11 | for a indefinite period [prep] | 6 |
|
