OECs were trained to constantly use terms like "Ussher's chronology" and other slights of hand to make it seem like YEC views were some freakish modern invention.
The YEC view was universal. (outside of pagan India and perhaps other non Western nations that is)
Why do you think Charles Lyell put the age of the Earth as young as 100,000 years old even after his groundbreaking 1831 book?
(I think his range was 100,000 to 1 million but I'm not too sure)
Answers in Genesis is actually correct in one area anyway (The Fundamentals of the early 20th century are irrelevant except perhaps as a catalyst for action on the part of YECs, but YECs were the vast overwhelming majority and the numerical superiority over OECs were even greater the further back you go)