| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] years have been [verb] | 57 |
|
| 2 | [num] years have [been] [vb pp] | 43 |
|
| 3 | [num] years has [been] [verb] | 27 |
|
| 4 | [num] years have [been] [verb] | 15 |
|
| 5 | [num] years had [been] [verb] | 13 |
|
| 6 | [num] years have [been] [v-ing] | 10 |
|
| 7 | two years have [been] [verb] | 6 |
|
| 8 | 10 years have [been] [verb] | 5 |
|
