| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of crab nebula | 0.34 | 0.9 | 4813 | 97 | 22 |
| history | 1.34 | 1 | 2744 | 44 | 7 |
| of | 1.38 | 0.8 | 7364 | 15 | 2 |
| crab | 1.44 | 0.5 | 1423 | 85 | 4 |
| nebula | 1.26 | 0.1 | 2067 | 48 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of crab nebula | 0.27 | 1 | 9780 | 26 |
