| time travelers in history | 1.36 | 0.7 | 7636 | 25 | 68 |
| time travelers mo history | 0.47 | 0.2 | 6237 | 25 | 96 |
| time travelers history museums | 1.45 | 0.2 | 5385 | 30 | 78 |
| time travelers history curriculum | 0.62 | 0.8 | 7711 | 33 | 51 |
| time travelers homeschool history curriculum | 0.28 | 0.4 | 5317 | 44 | 96 |
| time travel in history | 1.46 | 0.7 | 5626 | 22 | 22 |
| history of time traveling | 1.4 | 0.9 | 8796 | 25 | 88 |
| when did the time traveller travel | 0.78 | 0.3 | 4208 | 34 | 1 |
| stories of time travelers | 1.68 | 0.8 | 7852 | 25 | 61 |
| time traveler military history | 1.82 | 0.8 | 6302 | 30 | 51 |
| who are time travelers | 1.8 | 0.1 | 8149 | 22 | 86 |
| who invented time travel | 1.37 | 0.2 | 4989 | 24 | 79 |
| who came up with time travel | 0.07 | 0.2 | 3265 | 28 | 75 |
| when was time travel invented | 1.95 | 0.5 | 6059 | 29 | 74 |
| who discovered time travel | 1.8 | 0.3 | 9368 | 26 | 16 |
| when was time travel first mentioned | 1.06 | 0.3 | 9179 | 36 | 38 |
| who created time travel | 0.52 | 1 | 4386 | 23 | 23 |
| time travel historical events | 1.8 | 1 | 8008 | 29 | 71 |
