| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period [prep] [adj] years | 357 |
|
| 2 | [noun] [prep] ten years | 336 |
|
| 3 | period [prep] [num] years | 335 |
|
| 4 | period [prep] ten [noun pl] | 26 |
|
| 5 | period [prep] ten [noun] | 26 |
|
| 6 | period [prep] ten years | 18 |
|
| 7 | period [prep] ten year | 18 |
|
| 8 | period [prep] ten years | 18 |
|
