I'll just give my own personal experiences. I wrote a story in 2009, got rejected a jillion times, and it found a home at the end of 2011. Digital only (The Tower). My first, not my best, but it will always have a special place in my heart.
Second novel (digital only--Death Bytes) came out in 2012. Last year, first papperbok, Twisted, out, and this year will have two more papperboks, Lindsay Versus the Marauders (already out) and the sequel, Lindsay, Jo and the Tree of Forever. Catnip (digital only) is a novel I'm rather proud of although I loved writing the Lindsay/Jo trilogy.
Next year, who knows, although I am expecting at least two more. As for what UC said about taking a quick offer, that's good advice. At the outset, I didn't know who was good and who wasn't. I was just thrilled to have been published. Now that I'm a little jaded, I'm a tad more careful with who I go with and who I want to go with.