| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] [prep] [num] years | 108 |
|
| 2 | [been] [v-ing] this [prep] [num] | 8 |
|
| 3 | [v-ing] this [prep] [num] years | 8 |
|
