| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| permittivity of free space constant | 1.26 | 0.7 | 2235 | 84 | 35 |
| permittivity | 0.52 | 0.6 | 3519 | 23 | 12 |
| of | 1.69 | 0.1 | 1016 | 62 | 2 |
| free | 1.72 | 0.1 | 5470 | 93 | 4 |
| space | 0.25 | 0.7 | 3841 | 13 | 5 |
| constant | 1.89 | 0.7 | 598 | 50 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| permittivity of free space constant | 1.45 | 0.5 | 1243 | 98 |
