Data was collected for a sample of organic snacks. The amount of sugar (in mg) in each snack is summarized in the histogram below.

[Graphs generated by this script: setBorder(54,40,20,5); initPicture(158.6,166.5,0,15);axes(1000,2,1,1000,2); fill="blue"; stroke="black";line([160,-0.3],[160,0.3]); text([160,0],"160","below");line([161,-0.3],[161,0.3]); text([161,0],"161","below");line([162,-0.3],[162,0.3]); text([162,0],"162","below");line([163,-0.3],[163,0.3]); text([163,0],"163","below");line([164,-0.3],[164,0.3]); text([164,0],"164","below");line([165,-0.3],[165,0.3]); text([165,0],"165","below");line([166,-0.3],[166,0.3]); text([166,0],"166","below");line([167,-0.3],[167,0.3]); text([167,0],"167","below");textabs([165,0],"amount of sugar (mg)","above");textabs([0,115],"Frequency","right",90);rect([159.5,0],[160.5,6]);rect([160.5,0],[161.5,9]);rect([161.5,0],[162.5,15]);rect([162.5,0],[163.5,11]);rect([163.5,0],[164.5,3]);rect([164.5,0],[165.5,8]);rect([165.5,0],[166.5,4]);]

What is the most frequent amount of sugar for this data set?

mg

What is the frequency of the most frequent amount of sugar?