| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what is the permittivity of free space | 0.42 | 0.3 | 9274 | 38 | 38 |
| what | 0.14 | 0.3 | 1070 | 96 | 4 |
| is | 0.44 | 0.9 | 8915 | 82 | 2 |
| the | 0.47 | 0.1 | 1307 | 99 | 3 |
| permittivity | 0.6 | 0.9 | 1101 | 30 | 12 |
| of | 0.34 | 0.8 | 7017 | 39 | 2 |
| free | 0.87 | 0.8 | 7511 | 54 | 4 |
| space | 1.1 | 0.6 | 7240 | 5 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what is the permittivity of free space | 0.3 | 0.8 | 9163 | 95 |
