If you're going to break it down in the terms of math averages you should then probably consider his full body of work. Here's a good example, Bob Knight his first 19 years went to the dance 9 times and 7 conference championships.
I was only talking about the NCAA. He's been to the dance the last 6 years in a row. He's won the NIT and has only missed a post season tournament 3 times during his 19 year career. Coaching for 9 years at Winthrop he only missed the NCAA twice. And at WSU he's only missed a post season tournament once. And one could argue a NIT bid at a school like WSU is more than likely an at-large NCAA tournament bid for IU. Because, well, it's Indiana University aka see the name of this website. Yeah, I would call that pretty consistent.