| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| fentanyl history of discovery | 1.63 | 0.7 | 7995 | 66 | 29 |
| fentanyl | 1.36 | 0.3 | 2975 | 22 | 8 |
| history | 1.65 | 0.6 | 1626 | 94 | 7 |
| of | 1.09 | 0.6 | 7530 | 96 | 2 |
| discovery | 0.88 | 0.4 | 6485 | 9 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| fentanyl history of discovery | 1.61 | 0.1 | 8705 | 55 |
