galley proof vs repro

galley proof

noun

  • A trial page or proof of continuous text that has not been divided into pages. 

repro

noun

  • The proof prepared in offset printing, with all elements positioned on the page. 

  • A method for reproducing a bug or problem. 

verb

  • To reproduce (a bug or problem). 

How often have the words galley proof and repro occurred in a corpus of books? (source: Google Ngram Viewer )