| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| different eras in history timeline | 1.69 | 0.9 | 1082 | 22 |
| timeline of eras in history | 0.58 | 1 | 1097 | 8 |
| the different eras in history | 1.6 | 0.2 | 9219 | 25 |
| eras in world history timeline | 1.92 | 1 | 9684 | 22 |
| eras in us history timeline | 0.46 | 0.4 | 3885 | 36 |
| different types of eras in history | 1.43 | 0.5 | 4311 | 40 |
| time eras in history | 1.3 | 0.6 | 6216 | 49 |
| timeline of all eras | 0.85 | 0.9 | 5596 | 41 |
| list of eras in history | 0.89 | 0.9 | 2699 | 70 |
| types of history eras | 0.49 | 0.2 | 7227 | 88 |
| usa main eras timeline | 1.15 | 0.1 | 5811 | 99 |
