| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| secondary sources for history | 0.27 | 0.9 | 6220 | 23 | 29 |
| secondary | 1.81 | 0.7 | 181 | 16 | 9 |
| sources | 1.39 | 0.6 | 1282 | 11 | 7 |
| for | 0.24 | 0.4 | 7200 | 4 | 3 |
| history | 0.2 | 0.5 | 3050 | 13 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| secondary sources for history | 0.26 | 1 | 5959 | 66 |
| secondary sources for historians | 1.54 | 0.4 | 7736 | 72 |
| primary and secondary sources in history | 1.6 | 1 | 7976 | 43 |
| examples of secondary sources history | 1.51 | 1 | 2469 | 11 |
| what are secondary sources of history | 1.52 | 0.3 | 3749 | 81 |
| historians use secondary sources to | 0.79 | 0.7 | 8644 | 28 |
| why do historians use secondary sources | 0.27 | 0.4 | 5809 | 13 |
| how do historians use secondary sources | 0.94 | 0.4 | 3847 | 78 |
| how do historians create secondary sources | 1.1 | 0.1 | 3498 | 69 |
| are historians secondary sources | 1.09 | 0.5 | 8475 | 55 |
