How many times is the word 'first day' mentioned in the Bible?

Answer 1

In the King James translation, the word pair "first day" appears 48 times: 36 times in the Old Testament (where it most often has to do with something God commands the Israelites to do on the "first day" of a given month), and twelve times in the New Testament, where 6 of the 12 refer to the "first day" of the week, on which Jesus was resurrected.

Answer 2

This phrase is repeated 51 times in the King James Version.