| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| unit of permittivity of free space | 1.45 | 0.1 | 7765 | 50 | 34 |
| unit | 0.66 | 0.6 | 8024 | 99 | 4 |
| of | 1.53 | 0.2 | 9390 | 75 | 2 |
| permittivity | 0.74 | 0.6 | 8738 | 70 | 12 |
| of | 0.2 | 0.9 | 4422 | 18 | 2 |
| free | 1.41 | 0.7 | 7359 | 55 | 4 |
| space | 1.87 | 0.6 | 9323 | 80 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| unit of permittivity of free space | 1.51 | 0.7 | 6663 | 98 |
| unit of permittivity of free space e0 | 1.62 | 0.7 | 1672 | 60 |
| si unit of permittivity of free space is | 0.39 | 0.5 | 5122 | 87 |
| electric permittivity of free space unit | 0.27 | 0.6 | 7388 | 48 |
| units of permittivity of free space | 1.43 | 1 | 9853 | 10 |
| si unit of permittivity of free space | 1.18 | 0.7 | 3148 | 8 |
| permittivity of free space unit | 0.77 | 0.5 | 6992 | 83 |
| permittivity of free space constant e0 | 0.39 | 0.2 | 5827 | 5 |
| permittivity of free space units si | 1.11 | 0.9 | 6641 | 92 |
| permittivity of free space base units | 1.61 | 0.6 | 9907 | 55 |
| permittivity of free space f/m | 0.21 | 0.3 | 1534 | 15 |
| permittivity of free space equation | 0.02 | 0.1 | 8074 | 11 |
| permittivity of free space number | 0.68 | 0.2 | 1462 | 99 |
| permittivity of free space f/cm | 1.1 | 0.1 | 8707 | 84 |
