Swallowing the starry sky: Wish Fulfilment System

1 Century = 100 years (=10 decades)

1 Millennium = 1,000 years (=10 centuries)

1 Age, Era  = 10,081 years (=10 millennia)

1.000 Eras = 10,081,000 years (also 1 World Master lifespan)

1 Period = 1 billion Eras

1 Reincarnation Era = approximately 100 quadrillion years (= 10 trillion Eras)