I don't think 4 months is long at all for a lead single.
If she did 5 months, she'd have 1 single released right before the album too after the lead.
Again, it's impossible to guess unless we know if it's one or two leads. If she does two, she'd better not release some religious track for the second again.
"I think my second single is going to be Burning Bibles, I'll release it Xmas week"