Faculty position decision timeline I can't seem to find a answer regarding this point, I would like to know what the usual timeline from the point of application (for tenure track faculty position) submission to  contact for interviews looks like. I have applied to numerous positions, some in February of this year. More than half have neither rejected or contacted me and May is just around the corner. What can I expect?
It's hard to answer your question without knowing the country and field. I'll answer from my perspective, which probably extends to your situation, but take it with a grain of salt.

Here's a helpful resource describing in detail a typical (successful) job search timeline for computer science tenure-track faculty positions in the US: http://www.pgbovine.net/faculty-job-search-timeline.htm

Most interview invitations are sent out by the end of February. If you haven't heard by mid April (now), then unfortunately I think it's almost certain that you won't be invited. 

Another source of information: Most departments list seminar speakers on their website. When their seminar starts filling up with interviewees, then you know they have been sending out invitations.

Most places never send a formal rejection or, if they do, it comes so late that the outcome was already obvious. So don't expect to hear anything.

Commiserations. The academic job search is tough! I wish you the best of luck in your other endeavours.