| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] year [noun] of | 80 |
|
| 2 | [num] year [noun sg] of | 76 |
|
| 3 | [num] year period [prep] | 40 |
|
| 4 | [num] [noun] period of | 22 |
|
| 5 | [num] [noun sg] period of | 21 |
|
| 6 | [adj] year period of | 13 |
|
| 7 | [num] year period of | 13 |
|
| 8 | [num] year period of | 13 |
|
