| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| united states eras history timeline | 1.8 | 0.6 | 6275 | 87 |
| united states history eras | 0.27 | 0.7 | 604 | 88 |
| united states history timeline | 0.08 | 0.5 | 2300 | 53 |
| eras of history timeline | 0.16 | 0.1 | 5957 | 24 |
| united states historical timeline | 1.39 | 0.2 | 9027 | 11 |
| eras of us history | 1.87 | 0.2 | 6799 | 31 |
| timeline of historical eras | 0.75 | 0.6 | 4330 | 83 |
| eras of american history | 1.97 | 1 | 270 | 85 |
| timeline of us history | 0.45 | 1 | 2089 | 94 |
| timeline of usa history | 0.7 | 0.8 | 3571 | 2 |
| time periods of us history | 0.14 | 0.1 | 2480 | 59 |
| united states history research paper topics | 0.09 | 0.8 | 4194 | 3 |
| united states history essential questions | 0.07 | 0.5 | 1237 | 70 |
| united states history early years | 1.33 | 0.2 | 8140 | 48 |
| eras in the united states | 1.5 | 0.2 | 4568 | 72 |
| different eras in american history | 0.42 | 0.1 | 5098 | 76 |
| important eras in american history | 1.27 | 0.7 | 8696 | 51 |
