I'm going to talk about my works when they were free-to-read, rather than now that they're Premium. Premium novels have their own thing going on with featuring.
The Accidental Prince won the Third Writer's Camp, and was featured when winners were announced in February I think it was? So then my first feature for it was about four months after I started writing it.
Mortician of Avalon was featured about 2 months into writing it while it was still ongoing.
Freedom's Pyre took over a year to be featured but it was eventually.
Vee took around 4-5 months to be featured if I remember rightly.
EDIT TO ADD: I was updating every single day except Wednesdays while all these works were featured, so was super duper active and near the top of the rankings with these works which also may have something to do with being noticed as well.