| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [num] month period | 19 |
|
| 2 | [noun sg] [prep] [art] [num] month period | 17 |
|
| 3 | [noun] over [art] [num] month period | 11 |
|
| 4 | [noun pl] [prep] [art] [num] month period | 9 |
|
| 5 | [noun] [prep] the [num] month period | 7 |
|
| 6 | [noun] [prep] [art] six month period | 7 |
|
| 7 | [noun] in [art] [num] month period | 6 |
|
