Interesting article the other day (Herald Sun) regarding head high free kick stats in 2016. As you'd guess, Selwood had the most (28 from 24 games), followed by Mathieson (23 from 11 games), Maclean (22 from 15), Miles (22 from 19) and Christensen (20 from 11 games). Rounding out top ten were Hewett( 18 from 24), Hunter(18 from 26), Shuey (16 from 23), Sicily (16 from 22) and Duncan (12 from 24).
When compared to their contested possession stats (eg putting yourself in the firing line to possibly be taken high) it looks a little like this.
Christenson- 1 free kick for every 3.6 contested possessions
Mathieson- 1 for every 4.8 cp
Maclean- 1 for every 5.09 cp
Hewett- 1 for every 6.6 cp
Sicily- 1 for every 7.68 cp
Miles- 1 for every 9.45cp
Selwood- 1 for every 11.75cp
Hunter - 1 for every 11.83 cp
Duncan - 1 for every 13.8cp
Shuey- 1 for every 17.8cp
A little food for thought I guess. These were only available for the top ten high free kick winners so no doubt there would be other players in the top ten high free kicks per contested possession ratio as well.