Portions of it... as much as 70 (or even more). The Whole Book compiled in Canon? About 300 years. Was there no Church before the Book? Or better yet, was there no Church until the printing press was invented 1,400 years later? If Christianity is dependent on each believer reading his Bible and memorizing verses, that wasn't possible until 1431. This would be a church better founded by St Gutenberg rather than Christ.
My point being the NT Scriptures we know as the 27 books of the NT canon were available to churches within the 1st Century.