| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period [prep] [adj] years | 346 |
|
| 2 | [noun] [prep] six years | 186 |
|
| 3 | [noun sg] [prep] six years | 137 |
|
| 4 | period [prep] six [noun pl] | 56 |
|
| 5 | period [prep] six [noun] | 56 |
|
| 6 | period [prep] six years | 12 |
|
| 7 | period [prep] six year | 12 |
|
| 8 | period [prep] six years | 12 |
|
