Time since Concorde Supersonic Airliner entered service

Time since Concorde Supersonic Airliner entered service (46 y)

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Time since Concorde Supersonic Airliner entered service (46 y)

is 1/250 of Time since the end of the Pleistocene geologic epoch (11,700 y)...more
is 1/250 of Time since the earliest farming (11,500 y)...more
is 1/100 of Time since building of the Great Pyramid of Giza / Cheops / Khufu (4,580 y)...more
is 1/50 of Time since the birth of Archimedes (2,300 y)...more
is 1/50 of Time since the birth of Eratosthenes (2,297 y)...more
is 1/40 of Time since the birth of Diophantus (1,812 y)...more
is 1/20 of Time since building of Angkor Wat (903 y)...more
is 1/10 of Time since the birth of Shakespeare (458 y)...more
is 1/10 of Time since the birth of Galileo (457 y)...more
is 2/5 of Time since the publication of Einstein's theory of Special Relativity (117 y)...more
is 2/5 of Time since the birth of computer scientist Grace Hopper (116 y)...more
is 2/5 of Time since first Model T Ford launched (114 y)...more
is 10 x Period of Ceres's orbit (4.6 y)...more

If this was a standard unit ...