I hope no one has to tell you a 1,000,000 times that some language of the Bible is of the figurative speech type never to have been taken literally. Did you ever plan on being born again!
There is a pattern of literal years meaning literal years. I used to have a copy of the NAB (Catholic) bible, which had EXTREMELY liberal footnotes. Those notes would always assume that a book had to have been written after the giving of a prophecy, because the notes author never believed that God could give, and execute prophecy.
I may be wrong, and so may all the other premills, but I think I follow a good pattern set down by the prophey Daniel - he believed in literal years in the Bible.
Daniel 9:2 “In the first year of his reign, I, Daniel, observed in the books the number of the years which was revealed as the word of the LORD to Jeremiah the prophet for the completion of the desolations of Jerusalem, namely, seventy years.” (NASB)