Professional development experts have been reassessing other aspects of mentorship as well, including the notion of time. In the past, mentoring relationships were often expected to happen over the course of years, or even without any clear end date. Today, however, professional development experts advocate for mentoring relationships that are for a specific timeframe--ideally, six to 12 months. - See more at: http://blog.aicpa.org/2016/01/10-steps-to-finding-a-career-development-mentor.html#sthash.IGSU0GXn.dpuf