| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] had been [verb] on for | 18 |
|
| 2 | [noun] had [been] [v-ing] on for | 16 |
|
| 3 | [noun] had [been] going on for | 16 |
|
| 4 | [noun] had [been] go on for | 16 |
|
| 5 | [noun sg] had [been] [verb] on for | 11 |
|
| 6 | [noun pl] had [been] [verb] on for | 6 |
|
