| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] twenty [noun pl] | 11 |
|
| 2 | be [v-ing] for twenty [noun pl] | 10 |
|
| 3 | be [v-ing] for twenty [noun pl] | 10 |
|
| 4 | been [v-ing] [prep] twenty [noun pl] | 9 |
|
| 5 | be [v-ing] [prep] twenty years | 8 |
|
