| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] six months ' | 16 |
|
| 2 | [noun sg] [prep] six months ' | 13 |
|
| 3 | [noun] of six months ' | 9 |
|
| 4 | [noun] of six months ' | 9 |
|
