| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| major sources of history | 1.16 | 0.4 | 2740 | 32 | 24 |
| major | 1.12 | 0.7 | 6249 | 78 | 5 |
| sources | 1.89 | 0.7 | 9155 | 83 | 7 |
| of | 1.18 | 0.3 | 971 | 45 | 2 |
| history | 0.46 | 0.5 | 5371 | 88 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| major sources of history | 1.03 | 0.3 | 9060 | 13 |
