SimilarityRank
million_of_year 0.763 47068
for_thousand_of_year 0.753 26866
for_millennium 0.721 62319
thousand_of_year_ago 0.700 91960
for_hundred_of_year 0.662 43379
millennium 0.639 14057
for_century 0.630 10261
for_many_century 0.613 87438
century_ago 0.591 67706
human_civilization 0.584 84048
about_[number]_year 0.580 29004
ancient_culture 0.575 86296
ancient 0.571 4287
century 0.563 3434
since_ancient_time 0.562 92444
around_[number]_year 0.557 56380
human_culture 0.557 62520
our_ancestor 0.552 28856
fifty_year 0.552 57685
many_year 0.552 14319
human_history 0.549 48428
ancient_time 0.547 91668
forty_year 0.544 69982
ice_age 0.533 82789
in_ancient_time 0.531 48941