co dzień uczę się czegoś nowego - Every day I learn something new
Today I learned that co is not just what , but can also mean each . Also, with najmniej (least) it means at least Co 5 minut w Ukraine ginie co najmniej jeden okupant Every 5 minutes in Ukraine at least one invader dies (ginąć - to be killed / to die / to perish) Also, everyday can be written co dnia and codziennie.