| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [adv] used [prep] [noun] | 12 |
|
| 2 | been widely used [prep] [noun] | 8 |
|
| 3 | been widely used [prep] [noun] | 8 |
|
| 4 | been [adv] used [prep] [noun sg] | 6 |
|
| 5 | been [adv] used in [noun] | 6 |
|
| 6 | been [adv] used [prep] [noun pl] | 5 |
|
