This is the calculation for difficulty 15:
2³²x15/9400000/60
=114min for finding 1 block

There is something wrong with your setup if You are not matching the calculation. On average offcourse.

wasn't lucky. i hit the expected # of blocks for my hashrate. Last year net hashrate was much lower (as i mentioned in post) and hence difficulty was too.
difficulty determines how many blocks you can expect to hit in a given time period for a given hashrate.
and last year difficulty was less than half what it is now. It all maths out.

are you sure you got your decimal place right?   i get 2 to 3 blocks with 1.4 mh!!  (woo hoo!! ding!! just hit one while writing this post,  karma!!)
  10 mh should get you  around 14 blocks a day (at 1000mh net hashrate)

ditto that !  (see my previous post)

I mined spread for all of 2016 pretty much 24/7 with 2 lowly 750 ti's.

My average was around 4 or 5 blocks per day per card.

what miner are you using?

Let's see, this is about 0.8% of total hashrate, so in a day (1440 blocks) you should hit 11 blocks.
Roughly one every 2 hours.