| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] [num] years [unc] | 60 |
|
| 2 | be [prep] [num] years [unc] | 60 |
|
| 3 | be of [num] [noun] [unc] | 54 |
|
| 4 | be of [num] [noun pl] [unc] | 50 |
|
| 5 | be of [num] year [unc] | 50 |
|
| 6 | be of [num] years [unc] | 48 |
|
| 7 | be of [adj] years [unc] | 48 |
|
| 8 | [be] of [num] years [unc] | 48 |
|
