| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| types of vacuum tubes | 1.48 | 0.3 | 1027 | 46 | 21 |
| types | 1.86 | 0.6 | 3251 | 92 | 5 |
| of | 0.38 | 0.4 | 6514 | 84 | 2 |
| vacuum | 0.65 | 0.5 | 290 | 60 | 6 |
| tubes | 1.81 | 0.2 | 3501 | 55 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| types of vacuum tubes | 1.12 | 0.5 | 3790 | 78 |
